Gawd, there are tons of places to listen to music. Cocktail bars too. It's hard to recommend any without knowing what part of the city you'll be in. Let me see if I can dig up a list of concerts... there may even be some free ones in Golden Gate park during that time.
The MOMA is definitely the most well known of the museums around here. Sometimes the Legion of Honor (which is near my house!) has art exhibits... they had an art deco one last year. There is also a museum of Asian art, a comic book museum... not sure what else. Oh, the Exploratorium, which is like a science museum for kids. It's not art, but it's fun.
I bet if you do a Google search you'll be able to turn them up relatively easily.
EDIT: Here are some concert lists, from the websites of local radio stations.
Live 105
Alice 97.3
KFOG
(These are mostly big venues, maybe because it's too far in advance for the little venues to announce their shows... also check out
SF Station for info on concerts and events.)
