San Francisco Mime Troupe

http://www.sfmt.org/schedule/index.shtml

Free Shakespeare in the park (San Francisco Shakespeare Festival)

http://www.sfshakes.org/park/index.html

Folsom Street Fair

http://www.folsomstreetevents.org/

Autumn Moon Festival (in Chinatown)

http://www.moonfestival.org/

San Francisco Blues Festival

http://www.sfblues.com/

San Francisco’s Comedy Day

http://www.comedyday.com/

Critical Mass Bike Ride (begins at east end of Market St on the last Friday of the month at about 6pm)

http://critical-mass.info/