What is Virgin Active Hiding that 13 year old Kids are not Allowed to Work on the PC'S Unaccompanied

Virgin Active has changed policy and my 13 year old daughter cant sit at the computers by herself while we train, even though myself, my wife and other 14 year old are in the gym at the same time and often rotate and check on her. My daughters have been going to the gym with us from the age of 2 years old. They currently use that time to do homework at the pc or math exercises. What does Virgin Active have to hide that a 13 year old cannot sit and do homework at the pc, what happened at Virgin Active to prompt the change in Policy. You don't want teenage kids on the cardio equipment, you don't want them on the PC. They to big for the kids area , so what do you expect them to do.