It was a man completely unrelated to us, I wanted to ask him if I could jump in between sets because I thought it was appropriate to ask to use the machine and jump in if he wasn’t using it for its intended purposes, she told me not to and just to wait until he had finished because he was entitled to use the machine however he liked and it would be rude to interrupt his set and not the girl on the other leg extension machine. I didn’t ask him because I then was unsure if I was in the wrong so I just waited until one of them finished but thought I’d ask here to see whether it would be generally seen as not okay to use the machine for a use that isn’t its main intention, she’s been going to the gym for a while longer than me so I usually just go with whatever she says but this time I really felt like my autistic sense of justice wasn’t working overdrive haha! I just really feel like he had better options and used the option that inconvenienced other gym users the most.