The Largest Second Generation Robot Restaurant in China

Looking at the picture, it seems like they are leaning on the theme and the theater of humanoid robots rather than actually automating most of their operations - I'd guess that human clean the tables and operate the robots by remote control.

Anyway, the thing about automating restaurants is that going out to dinner is generally not about cheapness - if you want a robot cooked meal, you could most likely get it from the supermarket cheaper even if someone created a fully automated restaurant. Fast food may work on pure convenience and here it's possible automation could take over. Still, automating the cooking of food has the problem that either need a robot capable of cooking a wide variety of food or your restaurant won't be able to compete with constantly changing tastes.