Every time I've walked through Central Park I remember (hopefully correctly) that pic of Paul Newman riding a pocket bike around the sidewalks there.
He could get away with it... The rider I saw zip through on what looked like a gold/green Bronco? last year: Maybe pushing his luck? lol. Can't blame him/her though.
NYC would be a handy place to have a on/off/minibike to get around on, dangerous and fun, but handy sans the law. I've seen a couple running around on the sidewalks there though.