Go to as many events with open atmospheres as possible.

For example, http://ruby.meetup.com/99/?gj=sj2 (Ruby meetup)

http://superhappydevhouse.org/ (Hacker Party, not sure when we're having our next one)

If you have a blog, ask a hacker you like if you can buy them lunch and cover him or her in an interview, or just talk. Worst they can say is no.

Also there are a lot of coworking spaces opening up in SV, so if you get stuck with nothing to do for a day, you can try one of those.