The population of greater Buenos Aires is about 14 million.
There are countless numbers of restaurants. Yet I ate nearly every meal at one nondescript buffet catering mostly to locals.
Some of the choices were excellent. Especially Chinese items. Most especially the ribs.
Cost was less than half anywhere else I could find. Food in Argentina is expensive in both supermarkets and restaurants. They have trouble importing many items due to high tariffs.
It reminded me of my favourite restaurant in Rio. Another buffet.
Eat what you want. And as much as you want.