so you basically want take out outside your home. Japanese do that because eating out is cheap enough that it is an option to go there to just eat, not rarely

so you basically want take out outside your home. Japanese do that because eating out is cheap enough that it is an option to go there to just eat, not rarely alone, but it's absolutely not common to go to the restaurant to be left alone. all the things you mentioned as unpleasant are part of the reason why people gather to eat together