Located off the main shopping street behind the Nieuwe Kerk, Cafe Belgique is a small (ready tiny) gem of a place so good that you don't want to write about it for fear of it becoming too popular. As the name suggests they specialize in Belgium beers with 8 on draught and 30 by the bottle. Despite it being located in a tourist trap it is loved by the locals, expect to find an array of DJ's, artists and those in the know propping up the bar and spilling out onto the street.
I can't stress how bijou and oh so lovely this place is, the bar dominates the room with a small DJ deck in the upper corner playing a host of jazz music and beats that you can lose yourself in. For those lucky enough to arrive in time there are two small seating areas that serve as one big table, if all the seats aren't taken don't be surprised if someone asks if it is okay to join you, it only adds to the friendliness that even by Amsterdam standards is noticeable.
The walls play host to a range of artwork from posters to paintings which adds to the chaos of the place and suits its sizing down to the ground. The rules are relaxed here, the atmosphere is great but to fully appreciate it you'll have to go.
In short a beer lovers paradise that I'd rate as one of the best bars in Amsterdam, I can't recommend it enough.