Japantown Anime & Cosplay Fair
It's another perfect excuse for San Franciscans to costume themselves as their favorite anime characters. See wannabe J-Pop and K-Pop stars dance and sing, plus a mass gathering of Sailor Moons of all shapes, sizes, and genders.
Sunday, Aug. 17, 1-5 p.m. at Japantown Peace Plaza, S.F. Free; visit japancentersf.com/events.
Black Tie Beach Party
Don your best formal outfit that you don't mind getting ruined (tuxedos for men, long evening gowns for women) for an unusual day at the beach with random strangers. Dressed for prom, you'll build sand castles, play volleyball and frolic in the water during this annual (and unofficial) flash mob.
Sunday, Aug. 17, 1-5 p.m. at Ocean Beach near Lincoln and Great Highway, S.F. Free; visit bit.ly/btbp2014.
Return of the Cypher
Some of SF's best local beatboxers and emcees get freestyling at this weekly late night hip-hop jam. DJs and a live band lay down the beats for a spontaneous outpouring of raps and rhymes with breakdancers occasionally taking over the crowded stage.
Every Sunday, 9 p.m.-close at Boom Room Room, 1601 Fillmore St., S.F. Free; visit bit.ly/rotcypher.
Lindy in the Park 18th Anniversary
Since 1996, Golden Gate Park has been hopping every Sunday with a massive free swing dance party. Celebrate 18 years with a potluck picnic, annual group photo, free dance lessons, and a full afternoon of Charlestons, Texas Tommies, and Frog Jumps.
Sunday, Aug. 17, 11 a.m.-3 p.m. near JFK Drive and Music Concourse Drive in Golden Gate Park, S.F. Free; visit lindyinthepark.com.
Visit Funcheap.com for a hand-picked list of more fun, free, and cheap things to do in S.F.