The stage is about 30ft wide with stairs going down on either side. I can't block the stairs. The actual corners of the room each has a door that can not be blocked: the main entrance, two fire doors, and the door to the concession area.
Stage right is a big partition blocking the view of the ladies room door. There is not enough room leftover on that side to put a stack of subs.
Stage left is do-able. There are some doors that are seldom used. So I could wall load the subs there, and I might try that next time.
The stage is about 4ft tall...so it's not a "wall" for wall loading purposes. The back of the stage is covered in heavy drape that sits about 4ft from the actual back wall. I dare not touch the drape according to the last person who tried.

Center clustered seemed to be a reasonable place for the subs. They did nearly gag when I said that the V-stack of T39's sticking out almost 4' into the room would be staying right there. A line of chairs across the front of the stage convinced them that the subs would not be a "trip hazard."
The hardest part of the setup at this venue is that the same people have been setting up the same way for 15 years! For instance, I had to hear about how "...whenever we used subs in the past, we always put 'em on the corners of the stage..." ALL NIGHT LONG! Change is tough.
--Stan Graves