I’m guessing the french use the same words. And maybe some english speaking countries as well? Given how pervasive french is around restaurants.
- adjective: (of a restaurant meal) having unlimited choices with a separate price for each item
- noun: a menu having individual dishes listed with separate prices
- adverb: by ordering items listed individually on a menu
Or at least not completely extinct in South India. Some of my favorite childhood memories are from these messes (short for mess hall, I assume). You go there, pay what they ask, eat what they serve.
MTR, Brindavan on MG Road (though that's long gone), Iyer Mess in Malleshwaram.
What they lack in choice they usually make up for in taste.
You're right that they have a more traditional ambience and newer restaurants offer more choice, but they are definitely thriving in the parts of Bangalore that I grew up in.