San Francisco Akihabara? | Ask MetaFilter: "I'm going to be in San Francisco for a conference from 3/14-->3/18, but sadly not the emerging technology conference. Anyway, I was wondering if there is anything like Japan's Akihabara--some sort of dense flea market with strange gadgets and such, that I might visit. Any sort of robot-themed 'performance' involving flammable materials would be cool too, but I've heard that Survival Research Labs isn't allowed to play in the city any longer. In short, what would be some cool geeky/techy things to do while there that might not be available elsewhere and won't land me in jail?"