One of the few spots in Warsaw that is open 24 hours a day, seven days a week, Café Bar Lemon sits above the busy Lemon Club and acts as a launching point for an evening of fun in busy Sienkiewicza street (or the place to wrap up your debauchery, since omelets and pancakes can be had for hangover prevention). The bright yellow walls and loungey furniture seem to encourage long-term cocktail sipping.