The other one I'm seeing lately is a semi-stealth "service charge" on the bill. Something like 18% to 20% added to the bill without really standing out. This used to be something they'd do for "larger parties", but now I'm seeing it even when I'm eating solo. This makes for an uncomfortable situation where I now have to ask the waiter or bartender if they receive this as a tip. Then I need to decide if I want to tip…
I've yet to come across it. But when I do, I will refuse to pay it and I will also refuse to leave any tip. And I will never return.