around here it's The Tastee Diner ...It has been a local landmark for many years...open 24/7 and all the greasy food and insults from the waitress you could want... they just moved it to make room for a new building. (There are actually 3...the one in Bethesda serves grits, and Jonathan Eberhart used to delight in dragging folk singers up there at midnight after a concert and trying to feed them grits .... Holdstock & McCloud, Lou Killen ...etc)

In Wichita, Kansas the one I knew about was The 21st Street Grill...one of the daily specials was an "Onion & Baloney sandwich" It was in an industrial park, and had slaughter houses and oil refineries for neighbors...the odor was....ummm....interesting.