Thought I'd bump this in case any newbs are coming!
Also, new tip.
Go here:
http://www.jazz-cafe-alto.nl/
if you like Jazz.
Went for first time last year on a Sunday which is a kind of relaxed open mic affair hosted by a stunningly good girl trumpet player. Lots of people from all over the world had turned up to play and it was just the best night.
If you don't like jazz, you will probably find it shit.