Kolibear - i accept your point and in a "club" environment i would agree(by the members for the members not for profit type affair), but at a school (which most "clubs" actually are lets face it) the cost of the aeroplane is where the money should be taken to pay the bills. That also ensures that those using the facilities more pay more.
You dont have to become a member of Hertz to rent a car, and most of their facilities are far smarter than your average flying school!!!!