This square is the end of the red light district and it has got a lot of great bars and restaurants. I've been to Cafe Fonteyn (see above), Cafe Cuba (packed with people and a funny smell - but it looked great!)and another beer bar but I can't remember the name at the moment.
All the bars around Nieuwmarkt and the bars on the Nieuwenzijds Voorburgwal.
Great music, cheap drinks and local people.
Dress Code: No dress code