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Flex Mussels - UES, New York, NY

Flex Mussels - UES

4.6
4.6
2803 Reviews
$30 and under
Seafood

Make a booking

2 people
19:00
Booked 84 times today
Experiences are available.
  • Neighbourhood gem
  • Lively
  • Charming
Direct importers of mussels from Prince Edward Island and oysters that taste like you're kissing the sea.

Dining areas

Additional information

  • Dining style
    Casual Dining
  • Price
    $30 and under
  • Cuisines
    Seafood, American, Canadian
  • Hours of Operation
    Brunch Fri–Sun 11:00–16:00 Happy Hour Wed, Thu 16:00–17:00 Dinner Daily 17:00–22:00
  • Phone number
    (212) 717-7772
  • Payment Options
    AMEX, Discover, Mastercard, Visa
  • Dress code
    Casual Dress
  • Area
    Upper East Side
  • Cross Street
    South East corner of 81st Street and Third Ave
  • Parking details
    Street Parking
  • Public transit
    4, 5 & 6 trains to 86th Street, and M79 and M86 buses to 3rd Avenue.
  • Additional
    Bar Dining, Bar/Lounge, Beer, BYO Wine, Corkage Fee, Counter Seating, Full Bar, Non-Smoking, Patio/Outdoor Dining, Wine

Experiences

  • Giuseppe's Pop Up

    3 Feb 2025 - 16 Mar 2025
    Join the team behind Wonderful Restaurant Group (Flex Mussels and Hoexters) for a 2 week pop-up, bringing your favorite Italian American classics to the table. We're excited for you to try the best Spaghetti & Meatballs you've ever had and Carm's Famous Parms. See you at Giuseppe's!
    Giuseppe's Pop Up photo

What 2,803 people are saying

Overall ratings and reviews

Reviews can only be made by diners who have eaten at this restaurant

4.6
4.6 based on recent ratings
  • 4.6Food
  • 4.6Service
  • 4.5Ambience
  • 4.3Value

NoiseModerate

Loved For

  • New York City

    Seafood

  • Manhattan

    Seafood

Review summary

AI-generated from verified diner reviews
Flex Mussels - UES offers an innovative dining experience with standout mussels in flavorful broths. Guests appreciate the "best oysters and mussels in NYC" and the attentive service, highlighting servers like Jack and Eden. The lively atmosphere is balanced by cozy outdoor seating. The pop-up restaurants add excitement with delicious options.

2,803 Reviews
  1. joya

    VIP

    San Francisco

    1 review

    3.0

    1 review

    Dined 1 day ago

    1. Overall 3
    2. Food 3
    3. Service 3
    4. Ambience 3
    Giuseppe’s pop up food was fine but service was very slow even though the restaurant wasn’t full

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  2. Jessica

    VIP

    New York City

    36 reviews

    2.0

    36 reviews

    Dined 2 days ago

    1. Overall 2
    2. Food 3
    3. Service 2
    4. Ambience 4
    The outdoor heating wasn’t working, for an outdoor reservation (which we weren’t notified about). They were out of 50 percent of their oyster selection at 12:30pm … which is just very very doubtful it was because they “sold out”. The service was disappointing, and it’s kind of been a theme lately with this restaurant group. I was a fervent supporter of them but they have consistently dropped the ball as of late the few times I’ve frequented their establishments and it’s mostly service related issues. I was told it’s a health issue to have my dog on my lap while sitting but then another couple sitting behind us was allowed to have their dog on their lap? I’m not sure if it was discriminatory ? Neither was a service dog, so I’m left to wonder why the rules applied to me weren’t for everyone else as well. The food was passable, under seasoned and just an overall underwhelming experience.

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  3. Kambiz

    VIP

    New York City

    50 reviews

    4.0

    50 reviews

    Dined 2 days ago

    1. Overall 4
    2. Food 3
    3. Service 5
    4. Ambience 4
    Unfortunately this visit to Flex Mussels was very disappointing. All the staff is very friendly and the service is very professional. The special mussels for $40 were very bland and there was not much flavor in there except salt. Also, the mussels were very small and chewy. In our last visit in May 2024, the mussels were the best we ever had. You can find mussels in many restaurant menus and they are not expensive at all. We go to Flex to get really good mussels prepared in a tasty broth. Unfortunately, if we can't be sure about the quality, why would we go back.

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  4. Marisa

    VIP

    New York City

    10 reviews

    5.0

    10 reviews

    Dined 4 days ago

    1. Overall 5
    2. Food 4
    3. Service 5
    4. Ambience 5
    Our sever Jack was wonderful! So attentive and polite. Very refreshing

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  5. rose

    VIP

    Denver

    16 reviews

    5.0

    16 reviews

    Dined on 14 February 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Very attentive to our needs and always checking on the customers Oysters were great

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  6. Rena

    New York City

    6 reviews

    5.0

    6 reviews

    Dined on 13 February 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    I went to the pop-up restaurant Giuseppe’s. The service was attentive, and the food was amazing. I had the burrata, which was perfectly pared with sundried tomatoes. The Branzino was one of the best I've had. I love that Flex Mussels continues to bring us such innovative options.

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  7. Sydney

    VIP

    New York City

    4 reviews

    5.0

    4 reviews

    Dined on 12 February 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    The Giuseppe’s pop up was incredible! Classic old school Italian food that was delicious!

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  8. Kate

    VIP

    New York City

    3 reviews

    5.0

    3 reviews

    Dined on 12 February 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    We attended the Giuseppe pop up and it was incredible! From the service (Taylor was awesome!) to the menu options and the ability to add a meatball to any dish - um yes please! Everything was just perfect and exactly what we were hoping for. Will definitely be back, not only for this pop up but for any Flex has in the future!

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  9. ruth

    VIP

    New York City

    39 reviews

    5.0

    39 reviews

    Dined on 11 February 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Food was fantastic Our server was great Hope you find a permanent location

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  10. Andrea

    VIP

    Washington DC

    26 reviews

    4.0

    26 reviews

    Dined on 6 February 2025

    1. Overall 4
    2. Food 3
    3. Service 5
    4. Ambience 4
    Fun pop up restaurant with lively atmosphere, friendly service and tasty, solid Italian food staples. The tiramisu was particularly delicious.

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FAQs

Flex Mussels - UES is rated 4.6 stars by 2803 OpenTable diners.

Yes, you can generally book this restaurant by choosing the date, time and party size on OpenTable.

Make a booking

2 people
19:00
Booked 84 times today
Experiences are available.
Google Map for Flex Mussels - UES

1431 3rd Ave, New York, NY 10028

Dining areas

Additional information

  • Cross Street
    South East corner of 81st Street and Third Ave
  • Area
    Upper East Side
  • Hours of Operation
    Brunch Fri–Sun 11:00–16:00 Happy Hour Wed, Thu 16:00–17:00 Dinner Daily 17:00–22:00
  • Price
    $30 and under
  • Cuisines
    Seafood, American, Canadian
  • Dining style
    Casual Dining
  • Dress code
    Casual Dress
  • Parking details
    Street Parking
  • Public transit
    4, 5 & 6 trains to 86th Street, and M79 and M86 buses to 3rd Avenue.
  • Payment Options
    AMEX, Discover, Mastercard, Visa
  • Additional
    Bar Dining, Bar/Lounge, Beer, BYO Wine, Corkage Fee, Counter Seating, Full Bar, Non-Smoking, Patio/Outdoor Dining, Wine
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