Enable JavaScript to run this app.
Skip to main content
OpenTable logo
Flex Mussels - UES, New York, NY

Flex Mussels - UES

Visa logo badge

Visa Dining Collection

4.7 (2828)
$30 and under
Seafood
1431 3rd Ave, New York, NY 10028

Make a reservation

2 people
7:00 PM
Booked 70 times today

About this restaurant

  • Neighborhood gem
  • Lively
  • Good for special occasions
Direct importers of mussels from Prince Edward Island and oysters that taste like you're kissing the sea.

Additional information

  • Dining style
    Casual Dining
  • Price
    $30 and under
  • Cuisines
    Seafood, American, Canadian
  • Hours of operation
    Brunch Fri–Sun 11:00 am–4:00 pm Happy Hour Daily 4:00 pm–6:00 pm Dinner Mon–Thu, Sun 5:00 pm–10:00 pm Fri, Sat 5:00 pm–10:30 pm
  • Phone number
  • Payment options
    AMEX, Discover, Mastercard, Visa
  • Dress code
    Casual Dress
  • Neighborhood
    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

What 2,828 people are saying

Flex Mussels - UES reviews from people who’ve dined at this restaurant. Based on recent rating.

Overall ratings and reviews

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

4.7
4.7 based on recent ratings
  • 4.7Food
  • 4.7Service
  • 4.5Ambience
  • 4.4Value

NoiseModerate

Review summary

AI-generated from verified diner reviews
Flex Mussels - UES offers a delightful dining experience with "delicious mussels and donuts," "fantastic service," and a "charming atmosphere." Happy hour is a hit with $1 oysters, and their outdoor seating is cozy and inviting. While noise can be an issue, the food consistently shines, making it a must-visit spot.

2,828 Reviews
  1. Adam

    New York City9 reviews

    5.0

    Dined 1 day ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Every time I go I always enjoyed the food and the drinks are always the best.

    Is this helpful?

  2. Jen

    Philadelphia10 reviews

    5.0

    Dined 5 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Happy hour oysters followed by the best mussels on the planet, Devine wine and ambience—don’t sleep on this place!

    Is this helpful?

  3. Dr. Lawrence VIP

    New York City125 reviews

    5.0

    Dined 7 days ago

    1. Overall 5
    2. Food 4
    3. Service 5
    4. Ambience 4
    Drinks, service, and food wonderful. Only complaint was that my salmon was cold when it arrived. Ate it that way because the restaurant was so crowded that I knew it would take quite some time to get it back. Drinks took a while to arrive but they were worth the wait. Puddle Jumper was excellent. Aidan, our waitress couldn’t be more pleasant. She was knowledgeable about the menu and very attentive.

    Is this helpful?

  4. April VIP

    New York City4 reviews

    5.0

    Dined on May 1, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 3
    I love flex muscles..the food is really good. The service is nice. I sat at the outdoor patio with my friends. It’s not the ideal ambience and we were in the corner a little smushed. Otherwise, everything else was great.

    Is this helpful?

  5. douglas VIP

    New York City88 reviews

    5.0

    Dined on April 29, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Amazing as always! Food… yum…. Staff yay! The calamari is perfect! Oysters! 🦪 wow and the sliders were amazing for no seafood friend! Happy hour rocks!

    Is this helpful?

  6. Steven

    Unspecified1 review

    4.0

    Dined on April 27, 2025

    1. Overall 4
    2. Food 5
    3. Service 3
    4. Ambience 3
    Good food, service was a bit behind though. Still, would go back.

    Is this helpful?

  7. Heather VIP

    New York City3 reviews

    5.0

    Dined on April 27, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Thai mussels we so flavorful and my friend liked her parma mussels. We highly recommend and plan to return - well worth the trip from Westchester County.

    Is this helpful?

  8. Melissa VIP

    Indiana8 reviews

    5.0

    Dined on April 25, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    We had a wonderful dinner! Jason was our server and was fantastic from service, attitude and recommendations! Perfect evening!

    Is this helpful?

  9. Laura

    New York City4 reviews

    5.0

    Dined on April 22, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Always a great experience at Flex! This is our annual visit for our son's birthday celebration. It never disappoints. Food was delicious, service fantastic and on a Monday night the place was nice and quiet.

    Is this helpful?

  10. Carla

    New York City7 reviews

    4.0

    Dined on April 18, 2025

    1. Overall 4
    2. Food 5
    3. Service 5
    4. Ambience 5
    Wish they would fix the benches. You sink deep into them Other than that, everything was fabulous. Will keep coming back for more. 

    Is this helpful?

FAQs

Flex Mussels - UES is rated 4.7 stars by 2828 OpenTable diners.

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

  1. Home
  2. United States
  3. New York City
  4. Manhattan
  5. Upper East Side

Make a reservation

2 people
7:00 PM
Booked 70 times today
Google Map for Flex Mussels - UES

1431 3rd Ave, New York, NY 10028

Additional information

  • Cross street
    South East corner of 81st Street and Third Ave
  • Neighborhood
    Upper East Side
  • Hours of operation
    Brunch Fri–Sun 11:00 am–4:00 pm Happy Hour Daily 4:00 pm–6:00 pm Dinner Mon–Thu, Sun 5:00 pm–10:00 pm Fri, Sat 5:00 pm–10:30 pm
  • 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
OpenTable
  • About Us
  • Blog
  • Careers
  • Press
More
Businesses
  • Restaurant reservation software
  • Industry insights
  • Hospitality resources
  • Marketing resources
  • Operation resources
  • How to open a restaurant
  • For restaurants
  • For restaurant groups
Join us on
  • Privacy Policy
  • Terms of Use
  • Cookies and Interest-Based Ads
  • Do Not Sell or Share My Personal Information
  • Cookie Preferences
Copyright © 2025 OpenTable, Inc. 1 Montgomery St Ste 500, San Francisco CA 94104 - All rights reserved.
OpenTable is part of Booking Holdings, the world leader in online travel and related services.
Booking Logo
Priceline Logo
KAYAK Logo
Agoda Logo
OpenTable Logo