24 Hour Fitness USA

Tressa York is a member of 24 Hour Fitness on Columbia Tech Center before she became an Aqua Instructor. When at the gym, I get the feeling she acts like she is the only one there. She is loud, rude and has no manners, and it makes me wonder how she was an applicable candidate to become an instructor at the gym.
We all pay dues at the gym but she acts like she owns the gym. I'd been going to the gym for a very long time now. I am always early to save my spot, but Tressa York doesn't mind if you arrive early and will squeeze her yoga mat right next to mine just to be close to the fan. But people are already there and I don't know why she thinks this is appropriate because I feel it is rude to others because we're all there to exercise and not looking for a fight.
I didn't want to escalate this any further until she hit me in the shoulder walking into the bathroom. There was no apology or acknowledgement and I feel like it was on purpose after I had a word with her in the classroom. I just want to ask for your help paying attention to this employee of yours, because I have the feeling she could escalate this further and I feel threatened to go to the gym while she is around. I really would not like this to end up in a fight as I have been going to this gym to exercise for 8 years and would appreciate if some action could be taken. Thank you.