Sketch comedy is like the violin—played well, it's heaven; played ill, it's hell. Fortunately, this year's SketchFest (the oldest sketch-comedy festival in the country) is curated by Becky Poole, half of the Cody Rivers Show, and other people who know from funny. Tonight's late show looks especially promising: the All American Push Up Party (aka Dusty Warren, whose mind is a cyclone of sad clowns and Tupperware) and Seattle's collective of quality, young standup, the People's Republic of Komedy. (Theatre Off Jackson, 409 Seventh Ave S, 800-838-3006. See www.sketchfest.org for schedule, $15. Through Sept 27.)