Klub 21 is a nice little gay bar in Prague, located in a historical brick-walled cellar. Very cozy and intimate atmosphere. They serve good food and good cocktails, try the vegan pina colada! Staff is very nice and helpful. There is a nice arty vibe to that place, with all the local artist’s work decorating the place. Drink prices are ok. The place is a little bit hidden so to find it, when you are in front of the address (Římská 419/21, Vinohrady) enter the main building and cross the courtyard to the left