Flatiron Lounge 37 W 19th St New York NY 10011 USA http://www.flatironlounge.com/ (Map) CLOSED: Flatiron Lounge closed in December of 2018. Flatiron Lounge Closing (Eater, NY) Stepping into the Flatiron Lounge is like stepping back in time. Appointed in an art deco motif, it presents it's customers with a taste of what a 1920's speakeasy may have felt like, with two noteable exceptions. You don't need to know a secret password to get in, and the drinks are fabulous!