> There's more to diversity than skin color. Immigrants from other countries look for people who can speak their own language, eat the same food, worship the same gods etc, and given that the bulk of SF's immigrants (in the tech industry) come from across the Pacific, these communities are much larger in SF (33% Asian) than Atlanta (3%).

It's not that people don't mix, it's more that they define their identities by multiple tribal affiliations. And "tribal" doesn't just mean race, it means anything from Mac vs PC vs Linux, to frat houses, to financial traders, to progressive academics, to LARPers, to indie musicians, to YC applicants.

Plus the usual political camps.

There's a patchwork of scenes and monocultures which don't seem to have much to do with each other - which is a different and less permeable dynamic to just being interested in something, or working in some field.

It seems like we're all playing the same game, just with different pieces.