Flex Mussels

Name: Flex Mussels
Address: 1431 3rd Avenue, New York, NY, 10028
Price range: $$$
Rating: 4.5

Upper East Side · Seafood

1431 3rd Avenue, New York, NY, 10028Directions

4.51,195 reviews

People say this seafood restaurant offers fresh oysters, flavorful mussels in a variety of sauces, and delicious burgers and fish sandwiches. They highlight the lively and inviting vibe, and the good happy hour deals. They also like the friendly and attentive service.

Mussels alla vodka, bar-seat theater, and 6,522 check-ins of seafood pull.

Flex Mussels is a $$$ Seafood restaurant in Upper East Side, New York. It has logged 8,410 check ins on Blackbird, and is busiest Thursday afternoons. Check in on Blackbird when you visit.

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flexmussels.com

The experience

Sit at the bar for mussels alla vodka. The bartenders work well, and the semi-private setup—split by a support column—makes it worth the seat.

Google Places/ updated 122d ago

Why go

Flex Mussels holds a 4.5-star rating across 1,195 Google reviews and registers as a consistent Upper East Side draw. The seafood menu centers on mussels, oysters, and fish in various preparations. Regulars describe the vibe as relaxed and engaging. Blackbird data logs over 8,410 check-ins since August 2025, with Friday and Saturday traffic leading the week.

Google Places/ updated 122d ago

Fast facts

Flex Mussels has 8,410 all-time Blackbird on-chain check-ins.
Saturday and Friday are its busiest Blackbird check-in days.
Google users rate it 4.5 from 1,388 reviews.
Reviewers call out mussels, oysters, fish dishes, and attentive service.
One reviewer specifically recommends extra sourdough bread for the mussel broth.

editorial/ updated 10d ago

Did you know

Flex Mussels has logged 8,410 Blackbird check-ins, with Friday and Saturday leading the traffic.

editorial/ updated 10d ago

Good to know

They accommodate gluten-free and celiac-safe orders.
Order extra sourdough bread with your mussels.
The bar is the best seat in the room.

Google Places/ updated 122d ago

Amenities

Meals

BreakfastBrunchLunchDinnerDessert

Drinks

CoffeeBeerWineCocktails

Features

Dine-inTakeoutDeliveryReservationsOutdoor seatingRestroomGood for groups

Google Places/ updated 10d ago

Open in

Check in momentum

The room in motion

Activity413

check ins · last 30 days · active todaycheck ins · last 30 daysactive today

Flynet check ins

8,410

Neighborhood

Upper East Side

Last 30 days

413 check ins

−31% vs prior month

Sep 28Oct 27

When it's busy

Usually dead right now

Tuesdaytoday

12a12p11p

Inside Flex Mussels

The experience

Sit at the bar for mussels alla vodka. The bartenders work well, and the semi-private setup—split by a support column—makes it worth the seat.

Google Places/ updated 122d ago

Review signal

4.5

1,195 Google reviews

Google Places/ updated 10d ago

LOCAL HOTSPOTS

What’s hot around Flex Mussels

Live check in momentum from nearby Flynet restaurants.

Upper East Side

Today

8 check ins

3 check ins

All-time

73,969 check ins

67,985 check ins

31,514 check ins

19,325 check ins

New York

Today

8 check ins

6 check ins

5 check ins

4 check ins

4 check ins

All-time

73,969 check ins

67,985 check ins

38,888 check ins

37,377 check ins

33,327 check ins

NEARBY

Within walking distance

Other Blackbird spots a short walk from Flex Mussels.

FAQ

How popular is Flex Mussels?

Flex Mussels has logged 8,410 check ins on Blackbird.

When is Flex Mussels busiest?

Flex Mussels is busiest on Thursday afternoons, based on Blackbird check-in activity.

What kind of food does Flex Mussels serve?

Flex Mussels serves Seafood cuisine.

How expensive is Flex Mussels?

Flex Mussels is in the $$$ price range on a $ to $$$$ scale.

How do I check in at Flex Mussels?

Download the Blackbird app, visit Flex Mussels in person, and check in from the app. Check-ins earn FLY and count toward Flytown's daily Hotspots ranking.

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