Known for its seafood, Flex Mussels surprises with a burger that's a testament to its dedication to culinary innovation.

  • The Burger: Burger (Tier 2). An 8oz ground prime strip with lettuce, American cheese, special sauce, and pickles.. It’s a thick patty akin to a traditional NYC pub burger, but it’s structured and cooked perfectly to set itself apart. Amid their seafood offerings, this burger stands out. 

  • Pro Tip: Available only for brunch and lunch, not dinner. This burger is right as it is, so don’t make any substitutions - remember, this is a seafood place, so don’t make it complicated. The Filet O’ Flex and Deviled Eggs are other great menu options outside their traditional mussels. 

  • The Occasion & Vibe: Lunch Only. Meet an old friend or start your marathon day in their upscale but casual atmosphere. 

  • The Location: Upper East Side, 3rd Avenue & 81st Street.