I know it's just one anecdote, but a Subway employee in SOMA once asked me if I knew anyone that would hire him as a DBA. The feeling in SF is that the tech world is inescapable, which some people seem to like.
I moved to SF two years ago. Since then I've had a discussion with the cashier at Taco Bell about the differences in the way browsers render on different mobile OS's. Had a discussion with a banker that learned Ruby to help with some of his reporting...
Tech is everywhere here.