When I rushed this show this past Saturday, they were selling SRO as rush. I do know that before this started selling so well they had seats set aside for rush. But, my guess is that ever since it started selling so well, they decided to let the rush seats be sold at face value and use SRO as rush instead.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll