COMEDY: SF Sketchfest presents Comedy Noir's The XXX Factor: The Ultimate Dirty Joke Competition told via the troupe's trademark "Mockulebrity/ Impersonafacations," followed by Snob Theater's comedy variety show hosted by Shawn Robbins and featuring a line-up of comedians and musical guest Still Flyin'. (8 p.m., The Eureka Theatre, 215 Jackson Street)

HISTORY: Veteran City Hall observer Paul Rosenberg presents a slideshow and talk, "A Madcap Romp Through San Francisco Political History," about the chaotic beginnings of San Francisco with stories of the Vigilantes, duels, and early Black History; supervisors who went from the board chambers to jail; the strange resolutions on Prohibition; police scandals; and much more. (7 to 10 p.m., St. Philip's Church, 725 Diamond Street)

ART: This month's Sketch Tuesday is hosted by Hi-Fructose, in celebration of the launch of its 22nd issue. Score some affordable, one-of-a-kind art by local artists, and take a peek at 111 Minna's upcoming Harum Scarum exhibit, which opens on Thursday, while you're there. (6 to 10 p.m., 111 Minna Gallery, 111 Minna Street)