In this cabaret musical revue lyricist Henry Mach and composer Paul Katz take a grim-sounding theme and make it light, lyrical, insightful, and touching entertainment. Four gay men–two lovers and two loners–reflect on their lives while awaiting the results of their HIV tests. Their sung and spoken monologues trace each fellow’s journey from adolescent alienation and confusion to adult self-understanding and affirmation. Though the specter of AIDS hangs over all of them, their musical memories are concerned mostly with the days before AIDS–the era of social and sexual discovery that followed the 1969 Stonewall riots, evoked in a collection of witty and emotive tunes that convey a neat mixture of defiance and self-deprecation and gracefully avoid the subject’s potential for morbidness, polemics, or feel-good fluffiness. This brief revival of last spring’s sleeper hit reunites the committed, vocally superb original cast–Don Auxier, Dan Turek, George Smart, and Dan Ferretti–who, with the fine guidance of musical director Daniel Stetzel, communicate quirkily believable, emotionally textured characters. Puszh Studios, 3829 N. Broadway, 327-0231. December 11 through 19: Fridays, 10:30 PM; Saturday, December 19, 10:30 PM. $15.