Still doesn't need to have a price. If a homeless man comes in an order a coffe, and pays one cent, the owner will remember his face. Next time, the owner migh

Still doesn't need to have a price. If a homeless man comes in an order a coffe, and pays one cent, the owner will remember his face. Next time, the owner might refuse the service. Or if he orders a coffe, then another, and the most expensive sandwich, I think the owner will ask if he has some money to pay. If the novelty wears off, he can start charging people again, and maybe retain some costumers who just went there to check if the no-price thing was true.