This striking bit of hortatory graffiti was on the wall of an alley near City Lights Books in North Beach, when I was in San Francisco last week. (No, it wasn’t Kenneth Rexroth Alley, surely the best-named street in America.) The drip-effect may have been unintentional – at least at first – but I could imagine this being the basis for an entire lettering style. Whatever caused it, will or happenstance, it was effective.