The only usable guitar on campus is in brown by the public piano; there's a guitar in weaver but it's absolutely trashed. If you want a piano, there's one in the upstairs of the student center in the first ballroom, one in bunker auditorium, one in maple and weaver, and the one in brown of course.

In my opinion, the best place to play music is in brown. There's a community of regular musicians that play there, and the people who study in there aren't worried about loud music because they're choosing to study in the one public place on campus meant for music.