I don't think it's bitcoin only. In fact, can a licensed business operate legally and deny dollars as payment?
Discussion
Pubkey is a bitcoin bar in NYC.
come drink with us sometime.
I will definitely endeavor to do so when I am in a coastal capacity.
There are places that refuce to take fiat cash. I think the whole 'legal tender' thing is for contracts on debt payments. Just need a sign that clearly states Bitcoin only for payments.