Did Harold's have a backside before? Or even a door that suggested to lead there?
Nicolette added it - I think it was part of that last-ditch attempt to make the show look a bit sleeker. Terese got her Fourth Wall at about the same time. The door next to the toilet inside it meant to lead outside, though I'm not sure the inside and outside sets actually match up at all.
It was featured so much today that I actually wondered if they have taken down the Harold's Set or are re-vamping it (would seem weird)