Not so much recently but years ago my boyfriend and I used to hang out constantly with another couple. Whenever we would go out to a bar, my boyfriend would buy a round of drinks. Whenever the glasses would get empty and it was obviously time for another round, our guy friend would leave to use the bathroom. In the years that we all hung out together I don't think the other guy ever bought a round of drinks.
My parents, when I was a kid, use to know a family like this when they would all eat out at dinner. My dad, after paying for several meals, noticed Pete would never pay. So Dad stopped paying and then Bob, freaking out that the bill wasn't been paid, started paying. But Pete never did. My father and Bob complained and joked about that for years, long after Pete had moved away.