Epicenter is one of those trendy startupy San Francisco cafes where people stop by from coffee from their offices nearby in SOMA. They give internet in 2-hour incremenents in paper slip form with a lame web interface to make sure you bought something. Across the street is a building that would make a pretty good bomb shelter, but the coldwar-era sign looks faded since people don't care about NUCLEAR ARMAGEDDON SAFETY much these days. I just heard some people say "or I could continue speculating on bitcoins. I really like bitcoins" so it's one of those places as you might imagine.