I was attempting to manage the number of each "category" of player, so I could determine spawn points (if more than one student, student 1 goes here, student 2 goes here, etc.)
After reading another question, I think I could set up a custom property per category on the Photon Room and track it that way, since the "room" is a shared resource. I am going to try that and see if I can get it to work.
Thanks,