(I am waitressing at a wedding party being held above a bar in an art gallery. I have popped down to the bar to use their dishwasher. There are lots of contemporary art displays around the bar.)

Customer: “Hi, could I get a pint of Carling?”

Me: “Oh sorry, I don’t actually work here. You’ll have to ask someone else.”

Customer: “But you’re wearing uniform?”

(My uniform is not even slightly similar to the bar staff’s.)

Me: “Oh, that’s because I’m a waitress; I’m from upstairs.”

Customer: “Oh right, I thought you might be another art display. Okay, bye…”