I don't understand when waitresses have something to say. Take my order and go. I'm not going to be rude, but that is literally their job. I once had a fat waitress comment about my facial piercings when I was a teenager (18 or so) at a diner in NJ. Like rudely going 'i don't know how your parents are okay with that.'  My friend lived around the area, so we'd stop in for a coffee and share a meal. It was so unnecessary and it came out of nowhere! I ordered my meal, then my friend, and she looked me up and down and went, "I don't get it..." and then went on a mini tangent. My friend was so shocked, she stood silent.  I guess she thought I was younger?? I told the manager and we got our meal free. Didn't tip her. And I'm pretty sure she got fired because she wasn't there the next time I went.