Showtunes. Especially bouncy stuff like Bye Bye Birdie and Grease.
Punk covers of just about anything: specifically, Me First and the
Gimme Gimmes (kudos to Diane for introducing
us to their music!)
Radical rap (like these musical responses
fucked-up songs the bloodhound gang wrote, or like Queen Latifah)
Sixties and seventies happy sunny hippie music
Ani DiFranco, Laura Love
Techno remixes of just about anything (like a techno version we have
of the Inspector Gadget theme song, or one I heard in high school of Jimmy
Eurhythmics and other new wave music
Laura Love (just for Matt ;)
French rap like Panique Celtique... radical rap too.