Yeah yeah, there are threads like this all the time, but help me out please?

There's 4 male students going, we're staying in our friend's house near the centre of Copenhagen so accomodation is sorted, but do any of you have any suggestions for:

Galleries
Museums
Music
Cheap (relatively) bars
Cheap / Good restaurants or cafes

Lined up so far we have:
Mojo Blues Bar
Tivoli Gardens
Christiania (or whatever it's called)

and er, that's about it.

Oh and we're going from July 20th until the August 3rd, if there's any date-specific stuff.

Thanks!