Or be like plenty of places in Europe, chuck 50c in the basket outside the toilet. More if it's a number 2. Or if it was really clean.

One of the worst moments I had was in a rural part of Belgium, I had a call of nature whilst in the cafe, after completion I realised I had no euros left. Walk of shame to my table, the waiter notices nothing went in the basket and says something about Englanders just loud enough for me to hear.