As a brit living in the US, whenever family come over and we're paying a restaurant bill it's painful to have to tell them that typical tipping is 20% here, not

As a brit living in the US, whenever family come over and we're paying a restaurant bill it's painful to have to tell them that typical tipping is 20% here, not 10% like back home, and it's not baked into the bill either. That extra 10% can be pretty painful on a nice meal if you've mentally budgeted a specific amount, and that's in an actual restaurant with service. I used to be actually called a service charge, still is in some place, which reflects that's its for good service. At least, it was originally, and still is in Europe to an extent. It's not just a mandatory top-up regardless. It also mentally helps separate out the restaurant service change where there's genuine service, from the person just checking you out at a store or counter.