The local community college in Fremont has "classes" each Tuesday and Thursday from 7-8:45pm, and Sunday from 5:30-9:45pm (except for holidays), but usually only less than 10 registered students play, so it's virtually just free drop in, with 8 courts available, often half of them empty! Hardwood floors, pretty nice people, just beware the air ventilation on a few of the side courts, but otherwise, the more people the merrier! Most are novices, but a few are relatively decent, so if you come, it's best to bring a friend or few if you're hoping for good competition

Only tricky thing is the metered parking during weeknights, unless you park on street parking about 5-10mins walk away, but the school parking lot is free on Sundays.

Ohlone College 43600 Mission Boulevard Fremont, CA 94539
http://www.ohlone.edu
http://www2.ohlone.edu/nav/maps/mapkey3.htm (Gym is building 9)
Closest 680 exits are Washington or Mission south, 880 is Mission