"Piggly Wiggly what does it mean? Piggly Wiggly I've never seen! Is it a piggy or is it a worm? I'd never touch it might make me squirm! If I shall see one I'll tell you more. Grandmother says it's a grocery store!"
Piggly Wiggly [wiki] was the first true self-service grocery store. It was founded on September 6, 1916, at 79 Jefferson Street in Memphis, Tennessee, by Clarence Saunders. A replica of the original store has been constructed in the Memphis Pink Palace Museum - a mansion that Saunders built as his private residence but later sold to the city.
As seen on Flickr.