Forget the chocolate martini -- that's sooo yuppie. Lower Haight bar the Top, which hosts DJs nightly for its various house, drum 'n' bass, and downtempo parties, favors the Chocolate Cake Shot. It seems an impossible bit of science that a mix of vodka and hazelnut liqueur chased down by a sugared lemon slice can end up tasting like chocolate cake, but just mix 'em together and voilà! You've just shot the alcoholic equivalent of a Yoo-Hoo, a wonderfully childish offering that teases and confuses the senses almost as much as the eclectic beats that blare out of the bar's speakers.