I'm imagining going to a place where I sit and choose food without ever making price calculations, the restaurant also doesn't have to care about pushing drink orders or time spent at the table.

if the cost was low enough people would probably stop caring about optimizing and try to get their money's worth, while the restaurant would only need to focus on customer satisfaction to get renewals.

That must exist in some way, what is it ?

Edit: school restauration is that, and I genuinely think of it as a crucial system that helps so many kids. I could see company restaurants in the same light but the closed nature isn't great.