I don’t tip either, simply because the work done wasn’t worth tipping. The only time I tipped was in a 7 stars restaurant, and the waitresses were up to their names, literally standing and waiting by our table changing utensils and plates and filling the drinks. North America tipping “culture” is out of control, I remember picking up some street food and the guy asked for a tip.. Most restaurants nowadays buy the food from costco, machines do most of the cooking, and the waitress job can be literally replaced by a robot, it’s just a scam and it should be illegal actually.