I recall hearing a possibly apochryphal tale of a busker who was drinking in a busker's pub in Paris. He did not have enough money to pay his bill. Apparently, he told the staff, "I'll be back in half an hour." He went out, pitched and duly re-emerged half an hour later with more than enough money to pay his bill and continue drinking! I don't know if it actually did happen, but I have known plenty of places where it could have.