>There is a reason that the nationally-famous burgers at Au Cheval in Chicago, Hog & Hominy in Memphis, Holeman & Fitch in Atlanta, Shake Shack in NYC, Husk in Charleston, and probably a bunch of other destination burgers all use American, despite many of these places being sit-down establishments.
And what is that reason? We have Shake Shack here in DC, and the reason there is pretty obvious: Shake Shack is fast food. It's a tier higher than Five Guys, and two or three tiers higher than McDonald's, but it's still fast-food, and their burgers do not cost $12-15 like in nice restaurants, so of course they're going to use cheap cheese. As for those other places, I've never heard of them.
Maybe I'm just weird, because I generally consider fast food to be inedible, so I really don't pay much attention to chains like that. Shake Shack is probably the cheapest type of restaurant I would ever eat at, and that's pretty rare. I make enough money to eat good food.