Sunday Streets: Sunday Streets kicks off its 2011 season this weekend on the Embarcadero. Run, bike, walk, skate, hula hoop, etc. to your heart's content along the waterfront from Fisherman's Wharf to Mariposa Street.

[Update] Sunday Streets posted their rain policy on their Facebook page: "[W]e'll set up and be ready to go at 11:00 am and see what the day looks like. If there are few people and it looks like the weather will not clear up, we'll make a decision by 12:00 to end early, and the event will end by 1:00 pm, after we have cleared all participants from the roadways."

Girls Rock Camp After School Program: Catch a performance by some of the Bay Area's future rock stars in Berkeley on Saturday, featuring elementary and middle school students who have been honing their craft and writing songs together since January.

Vintage Fashion Expo: Well into its third decade, the weekend-long Vintage Fashion Expo showcases dealers from across the country selling women's hats, shoes, dresses, costume and estate jewelry, and men's suits, shoes, shirts, watches, and ties, along with vintage eye wear and textiles for the home.

Zion I & The Grouch: Snag an advance copy of West Coast hip-hoppers Zion I & The Grouch's sophomore collaborative album Heroes in the Healing of the Nation, which is set to release on Tuesday, at their special in-store performance at Amoeba on Sunday.

Tenderloin Walking Tour: Take a stroll on Saturday with Randy Shaw of the Uptown Tenderloin Historic District, who will teach you about the Tenderloin back in the day. Highlights include a visit to the building where film director Frank Capra once lived, where Grateful Dead founder Jerry Garcia resided, and where renowned boxer Muhammad Ali trained at Newman's Gym in the Uptown TL.