Most diners seems to be regulars. As for atmosphere, well, don't expect much. More emphasis is placed on keeping the food good and the prices low than on atmosphere and decor. You even have to step outside to gain access to the restrooms. The service is mixed.
Diners seat themselves.
Menus are available for breakfast service, but you need to ask for one. Our servers were friendly and pleasant and quick to refill our beverages. However, my dining companions were served their lunches at least five minutes before mine was served - without explanation. But all three meals had been cooked to order and were served hot, so we weren't too upset. I suggest you go into the Hickory House expecting diner service and you won't be disappointed.