Went to this UES coffee shop following a recommendation on this board.
After a couple of cappuccinos and croissants, we took our umbrellas and left. About halfway into the block we heard someone shout "hey, you there, you didn't pay!"
Of course we paid, but we still went back and reminded the person (who seemed totally out of it) that we paid.
An apology? no way - he just said "oh, ok" and went about his business.
I can assure you they'll never see me there again.