In a cafe with friends
Is it cheeky to go into a cafe you regularly go to with one of those stamp cards, where 10th drink or whatever is free, claim your free drink and not buy anything to go with it?
I say no, because you've effectively paid for the drink by paying for all the previous ones and it's no different to using clubcard vouchers or whatever.
Friend 1 thinks it depends on whether or not you usually order just a drink.
Friend 2 thinks it depends on how busy the cafe is
Friend 3 thinks it's mortifying.