The Mezzanine

and nobody would pay it

But would they really? I mean, if one restaurant decided to do it independently and ended up having prices that were 20% higher than their competitors, then yeah, they'd probably go out of business.

But if restaurants were held to the same minimum wage standards as every other industry, then all restaurants would be raising their prices, so it'd be a level playing field.

I seriously doubt that people would stop eating out altogether. They'd complain about the prices, of course (but they'd do that anyway) and maybe eat out a bit less, but on the whole, people would certainly pay it.