What do you do or have done about a gym douche?

Anonymous
this guy is such a douche , he has a girlfriend , they were having some issues a couple weeks back and suddenly he started to hit on other girls at the gym , one of them was a girl that i was interested in and had been attempting to get to know

but he has a girlfriend and yesterday i saw him there with her so why did he spent so much time hitting on the other girl when the girlfriend wasn't around? kept hoping the other girl would show up at the same time , my guess was he wouldn't of said a word to her if the girlfriend was around but when she wasn't he was all over it

so yeah pretty fed up with this guy and no idea what girl he actually likes , he's such a douche i wouldn't even be surprised if the actual girl he wants isn't even one of those 2 girls. without physically assaulting him with gym equipment not sure what i could do , though about talking to another girl there as a test and to see if he shifted his focus towards her , if he was just targeting girls at the gym guys were interested in to make himself more popular
What do you do or have done about a gym douche?
2 Opinion