One of the cultural eccentricities of Shanghai — and one that hardly fits with its current sleek, modern image — is a propensity for older people to walk around in pajamas, at any hour of the day.
San Franciscans don't have the excuse of longstanding tradition when donning sleepwear in public, however. Really, is it so much to ask people to wear actual clothes out-of-doors? And not physically assault your bus drivers? And not do both, simultaneously, as a woman recently did in Visitacion Valley?