[wayoutthere]

San Francisco is repeatedly called out as the prime example in The Color of Law by Richard Rothstein -- an absolutely fascinating (and depressing) look at statutory racism in the 2nd half of the 20th century -- specifically because it has a reputation for being "progressive". It was pervasive across the country until well into the 80s.

I assume you've read it since he focuses on the narrative of a black man working in the shipyards; but for anyone interested in reading further on the subject, I highly recommend it.