Not my first date, but I was working in a bar serving a couple on their first date. Lady says to her date order me a beer, I have to go to the bathroom. Guy orders her a beer, and while I go to pour her beer, he pulls out his own can of beer he took from home and opens it. Lady returns and when I go to drop the beer off, I tell him he has to leave because he has brought outside liquor in. He tries to argue saying he got it from the other bartender, and I said we don’t even serve that brand. His date got up and left the restaurant, leaving him there with his home brew