i live in san francisco, and i will say there is plenty of active film use. i just joined a small group of rangefinder folks, and im inquiring about a darkroom co-op in my neighborhood! at the street fairs, protests, and other events i still see a few film folks shooting. i too recommend that you check out rayko.. i took the wet plate class there (and they have a nice rental darkroom). there are also a few large swap meets in the aera which are good for finding used gear.