I always fought with my friend over this. Every time we went out with a group, he refused to tip, figuring everybody else could front the bill. Whenever I called him out on it he would complain about not having enough money to be able to tip, at which point I told him he shouldn't be eating out at all then. Once I told him he really needed to tip, because we had received particularly good service from a nice waiter. As we're leaving I see him slip the money back in his pocket. I always factor tipping into the bill. If you can't afford to tip, don't out. The only time I don't tip is if I'm angry at the waiters service, or if they're rude. In that case I won't tip them.
It's alright though, now I just have an excuse to make more Jew jokes at his expense.
It's alright though, now I just have an excuse to make more Jew jokes at his expense.