An important tip
While tipping is important for waiters, as sometimes this is the only salary they receive, when the service was really bad, we don’t feel obligated to tip, and we even feel like we shouldn’t tip to make a point out of it. When these people received bad service at the pub, they debated whether or not they should leave a tip, and decided on a creative solution.
While they ended up doing the right thing and leaving a tip, they made sure the waiter received their message that the service was bad: they put the money inside a full shot glass, meaning that the bills would be soaking wet, and if the waiter wants to get them out, he can’t do it without creating a mess.