This piece in Slow Boring about Denver restaurants (unsurprisingly) sparked a debate about American #tipping norms: https://www.slowboring.com/p/denver-piece

There was one tidbit raised in the comments that surprised me: Noodles & Company, a Denver-based chain, has a "no tips" policy. Well, I just happened to be in Denver and ate there (location on the 16th Street Mall downtown, for reference), and I never saw anything to that effect. The payment terminal prompted me to select a tip before providing my card, and I did leave a tip there.

I think restaurants adopting a no-tip model voluntarily is the way to go here, but if that's the way they want to go they should try to ensure that the tip option doesn't appear on the terminal.