Jesus, you say there are tourist attractions in Amsterdam!! Next time lol.
I've been 4 times now over the years, we blasted through the tourist attractions, then left quickly as we were dying for a.. ahem beer...
The casino is fun when you have had a few beers, also I liked the Exact Choice coffee/bar down from the dam square.
My rating of them:
Anne Franks - bit boring and heavy unless youre really interested in it (there was people crying when we went in, we left quickly after that)
Brewery - not bad
Art Galleries - if you can be bothered
Sex museum - why not, the pictures are funny
Peep shows - always fun, especially when you can see your mate in the window opposite
Live Sex Show - was the best, so funny, full of japs tourists (families lol)
Hooters bar is fun.
As everyone says stay away from the dodgy guys, just ignore them, if you talk they become interested, stick to whats in the coffee shops.
And beware mushrooms, thats all im saying on that one...
Enjoy!!