Involved, Socially @ Triple Base Gallery (Friday) "Triple Base's 'Involved, Socially' uses video installation, shadowplay, photography, and T-shirts to investigate the artist's process as a collaborative one. The wormholes start to form with stuff like Christine Wong Yap's mail-trading exhibit-within an-exhibit called 'This or That,' made of international post-office exchanges. David Horvitz contributes an oversize letter to the show's visual element, and leads an expedition as a happening-type conceptual contribution: an all-night art walk, which starts at 8 p.m." (Art walk goes from "dusk" on Friday to "dawn" on Saturday, and is free). Hiya Swanhuyser
Oldies Night @ the Knockout (Friday) Don your vintage best and party like the decades before you were born tonight at the Knockout. DJs Primo, Daniel, and Lost spin you back in time. With a $2 cover before 11 p.m. ($4 after), it's almost like the '50s all over again.
San Francisco Street Food Festival (Saturday) "Everyone loves to eat food in the street lately. It's all so fresh, so fancy, and so fast, just like the inaugural San Francisco Street Food Festival. On Saturday, Folsom St. closes down between 25th and 26th, the omnivores come out, and a caravan of food trailers and tents from the likes of Kasa Indian Eatery, Poleng Lounge, and Zella's Soulful Kitchen serve up handheld dishes for discerning urban palates. Ceviche, Moroccan squid salad, and handmade organic corn tortillas with slow-roasted and achiote-rubbed pork shoulder are just a few of the delights on offer from a selection of vendors spanning the culinary spectrum." (11 a.m.-7 p.m., free) Evan James