About buffets where you can’t share the portion

Where? → Where do you live? What are these "buffets"? Even in our middle town there are no such establishments))) People, does this really exist? Why go there at all?
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Surprisingly, but such a institution we encountered in Strasbourg))))
Paphos pizzeria, where every customer had to order a pizza the size of a table.
It was not possible to take one for two.
It was also not possible for adults to order a mini-pizza.
We looked, spotted and found a normal coffee.