Well, i live in the bay aswell and i can tell you that walking up to some black man in the tenderloin in sf will get you shanked. i suggest just asking some friends if they know anyone, that would be the safest option. next if the friends option doesnt work out i would try in school first, now thats not to say that you should buy in school(depends on how lax or uptight your school is on drug policy) just try and scope out some people you should definitly be able to find someone that way.

Good luck:rasta: