Kids not allowed to do push ups and ****** bars at Eastgate Virgin

This in in connection with the Eastgate branch, I have just moved from Old Eds to Eastgate on my 1st morning of training a Eastgate with my 2 boys, please note we where on the floor by the ****** bars the gym was not busy and I was training with them. I got approached by a manager who told me my kids where not allowed to train on any machines, I then pointed out that a machine has moving parts and these are ****** bars that they have in parks and schools throughout the country, I then also pointed out that I was training with my boys plus the gym was not busy at all in fact it was just us by the ****** bars. If the gym had been busy and we had been in anyone's way I understand, had I left my kids unattended I would also understand. What I don't understand is why I got told I was not allowed to train with my kids on a piece of equipment that no one else was using, why I got told there was a class taking place when clearly we where the only people around. I have never had this problem at any other gym. As I said the gym was empty and I am training or doing the exercises with my kids. Not a great 1st experience and has left a bad taste in my mouth and after being a member for over 30yrs now I think it's time to possibly change over to Planet Fitness.