Parking in NYC is terrible. Especially in Chinatown. The chinatown in Flushing is not as bad because there are a few Municipal parking lots. When I travel in Manhattan, I prefer to take public transportation. Even if you do find a spot in Chinatown, you have to worry about your bumpers getting dented/scratched up. The spots are really small.
I visited SF last year and the parking was actually better there.