The great joke at the center of Groove is that the Information Age has produced a class of smarter, more organized, more responsible outlaw druggies. At the start, a superefficient posse of twentysomething rave-organizers checks out an empty building in the warehouse district of San Francisco. Welcome to heaven.
Groove has a sense of humor about itself.
Stern yet merciful, he polices the rave for nonapproved substances and directs his minions to tend to those who've overindulged. He's Father Knows Best and Auntie Mame and Bill Murray in one, and Van Wormer plays him with just the right blend of gravity and irreverence. Like Ernie, Harrison doesn't impose. The credit sequence is a techno-blast of imagery, but then the movie settles into a more casual groove. Characters and strands of plot are picked up and set down with a DJ's feathery touch.