Through the grapevine

Game theorists like to talk about "zero-sum" outcomes, but at one of our local gyms I think we have a "zero-zero" one.
It seems a long-running Saturday morning Step Aerobics class was cancelled and replaced with a trendy Body Combat class. The Steppers, who are extremely loyal to their workout, were furious and felt betrayed and cheated, because there are already 11 other Body Combat classes on the schedule, but few other Step classes. The bulletin board in the lobby was full of complaints with exclamation points and underlining.
Well, it turns out that the Saturday morning slot is indeed drawing a huge number of Body Combat participants.
So many, in fact, that they're complaining the room is too small and they don't have enough space to move around. Nobody's happy.
I feel sorry for the beleaguered class scheduler, who is tasked with the sometimes-conflicting jobs of (1) keeping members happy and (2) bringing as many people as possible through the door.