Some examples of culinary habits:
Mediterranean – Slow paced eating, often outside with lots of conversation between bites.
China – Food is typically served family style with several different dishes placed on the table and people taking small amounts from each dish. You have to consider what everyone else at the table has eaten before you take anything.
Brazil – Food is rarely eaten with bare hands, hotdogs, snacks, sandwiches are normally held and eaten with napkins in public.
I'm aware there are many exceptions to these examples.