Dear Queenie,
I went to a restaurant for dinner with some friends and they paid the bill for all of us, including the tip for the waitress. When we were leaving I got a look at the bill and the tip they left was just the minimum amount.
I used to wait on tables at a restaurant and I know what a hard time that waitress had with us, so I added something to the tip.
Queenie, did I do something wrong?—Generous patron
Dear Generous patron,
If anyone had seen you looking at the bill and adding to the tip they might have been offended, so that was not a good idea. As it was not your party you were not responsible for the tip, but you could have just discretely left something under your plate, or thanked the waitress on your way out and slipped it to her then.