From my limited observation it seems like that might be possible. Many of their workers seem to be Haitian or Chinese immigrants. I don't really go there for anything but the occasional strawberry shake so my sample size is pretty small.

I remember walking into a McDonald's (early '90s) in an Arizona "gray town". My dad and I were the only people under 60 in the place.

They were good, too. They were a bit slower, the average age in the place probably being 70, but they had a much better work ethic than most people in fast food.