At Delirium, a dive bar in San Francisco’s Mission District, the decor is dark, the drinks are strong, and the emotions are raw. The punk rockers and old-school city natives here look tough, but they are in mourning.

Kit Kat used to bar-hop along the block, slinking into Delirium for company and chin rubs. Everybody knew the cat, affectionately calling him the Mayor of 16th Street. Kit Kat was their “dawg”, the guys hanging out on the corner say.