Ask HN: A weekend in Silicon Valley

I left my job in investment banking to start doing some freelance development and maybe start something up. As part of leaving I get to go to our USA office (in Detroit. I live and work in Sydney) and while I'm there I really want to visit Silicon Valley, most likely on the Oct 26th weekend.

As something that I read so much about, how can I get the most out of a weekend there? I'm most interested in just meeting like-minded people and hanging out, but unfortunately I don't know anyone living there.

Any tips? Cheers guys