There are already two places that I know of that take cash only. One is the coffee-and-juice place called Joe and the Juice. The other is a fabulous bakery in the Village. I was about to buy an obscene amount of shortbread for gifts at Christmastime and passed them by when I found out.
Oh and there’s a coffee shop on Carmine Street. They are nice people and just gave me the coffee. Unfortunately for them, there is another good one right across the street that takes cash. C’est la vie!