I remember Burger Chef from 1960s Florida, but I remember nothing at all about the food. I do know we ate there, at least a few times.
Did anyone have Red Barn? We ate there, too, and I guess we liked it. I seem to think the fries were shoestring, and that they featured fried chicken as well as burgers. That was in Florida, too, but the last one I saw was in Cincinnati, on Vine (I think), below the campus. That would have been around 1970.