If you are a vegetarian or a vegan, beans are a stock item in the daily diet. Navy and pinto beans are particularly part of your larder or should be. So I would say they are universally used by anyone who has restrictions in their diet (like vegetarians).
My wife and I are both meatless. We are lax, however: cheese and cream soups is something I don't wish to live with out. She likes eggs, cheese and no cream soups. She does wonderful things with beans and rice. Her soups are to die for.
We live in Canada, so I think soup beans are pretty universal, but the south might have dishes that are found nowhere else.
