Ultimate DVDs for Parties?

Adore333 asks: "I'm hosting a party on new year's eve and was thinking of playing some DVDs in the background (party music over the original soundtrack). I've chosen Trinity and Beyond and Microcosmos as the movies. Even though its likely a bit too late for New Year's Eve, I'd like to hear what media other Slashdot readers would suggest. The films should have great emphasis on visual expression and it would be nice if they were enjoyable as movies as well (like Trinity and Microcosmos). So, what's your ultimate party DVD?"