To those who live in or who have visited the United States.
Growing up in the 90’s, the “minimum acceptable” tip was 10%, average was 15%, and a good tip was 20%. These days, I just round to the nearest dollar and tip 20%, but I’ve heard these days it’s not unusual to tip up to 40%!
What do you usually do?
Stop tipping in EU. Last time someone asked me to tip in Germany got a 1 star review.
I do what I want.
Tipping in restaurants is normal in Germany; here’s the German Wikipedia article on the subject. Staff asking for a tip doesn’t seem normal though, and I’d find that rude.