The parlor is set up as it is due to the agreement with Mr. Owl. From time to time he or his organization are allowed to use the space.
As for, who is a part of this cult: Erin will simply answer, "more of us than you think, we are everywhere. You'll see now. "
She will add, "People like Victor," (Victor Landry was the "leader" at least of this sect) kept us down. He used his position to serve only the elite. That is why Ankroptik guided us to this moment. Ankroptik is done being hidden. But as long as they are in control they will continue to take advantage of their position, and take advantage of Ankroptik's generosity."