I've seen restaurants where they serve most of their food in plastic containers even for dine in customers. Most poke places for example always use a plastic bowl that patrons just throw away after they're done, along with plastic cutlery. Some restaurants serve water in cups with a plastic straw, which is also totally unnecessary.
Oh, I see... that's very unfortunate. The only kind of "restaurant" that does this shit over here is McDonalds (and similar US franchises) and it makes me shake my head. Do you know what's infuriating? They're now going all "green" in some spots. But instead of avoiding creating all the trash to begin with, they put it on you, providing four of five different cans for every type of trash, and patronizing signs on the walls so you work for them classifying and cleaning their shit.
The issues with the different cans, is that they need to be re-sorted manually anyway (usually by the city), since not everyone puts the right stuff in the right bins. All it does is it just gives the impression that the business is 'green'