Is there a nearby school with a chapter of your sorority?
It's one thing to have a "pretend to be a pnm and the other pretend to be a DZ" conversation when you probably KNOW all/most of the girls in your chapter. If you do the same thing, but with women you don't know very well, it might have a more authentic experience.
My chapter did this with a nearby chapter one time, and it was a lot of fun. We helped each other and made new friends in the process