^^^Understatement. The only city more "crowded" in my opinion in the US/Canada (and by a long shot) is New York, primarily Brooklyn/Manhattan. Ironically, the part of SF that is about as crowded as Manhattan has no parklets (I think it's just *too* crowded to take away from the streets in that part of town...plus all the honking and sidewalk traffic is a bit intense; I'm sure situation is similar in much of Manhattan). And as a result, I don't believe parklets have quite caught on there [in New York] like they have here in SF/Oakland/Berkeley. Cities like Philadelphia, Boston, Seattle as noted, and Chicago would be ripe for parklets.