Train bigger groups with limited space more effectively. Haven't you ever seen a University gym?
that's my point there have been gyms like this for 20 years.
i remember when the scpa (self contained power area - cage, bar, bumpers, 0-90 bench and dumbbell rack nearby) came out in the NSCA journal in the 80's... pretty soon everyone had rows of cages.
useless nautilus circuits went out the window soon after.