Anybody who lived in Greensboro back in the day remembers the Castle, the scene, and the burgers. I just found out Smith Street Diner has obtained some actual Castle sauce and is serving them again. For the real deal, get one to go. Eat it in the car (with 6 other people) while checking out the people parked next to you!
Smith Street Diner
438 Battleground Ave, Greensboro, NC 27401