More a WWYD...
Have been going to my local gym for 6 years. I am fat and unfit but can lift heavy weights and religiously go everyday.
I keep myself to myself, and rather than a hello/morning/have a good day to the people I see every day in the changing room keep myself to myself.
Over last 6 weeks or so a group of (middle aged) woman have started attending and frankly they are making my life miserable. Comments when I am on machines, comments in changing rooms, comments when doing free weights/lunges and so on.
They are genuinely making me feel uneasy and I now dread going (I enjoy the gym but not the experience).
I don't want to go to another gym as I like the gym I go to (and it suits me), I don't want to moan to the staff because I will look pathetic, but it is really getting me down. 
Sorry it is more of a rant and me getting things off my chest. I have always been big (over 6ft, 15 stone so not enormous) but badly bullied at school and maybe that is why I am so sad that my fun time which I have always enjoyed is being ruined.