Virgin Active VodaWorld double standards or selective treatment to members

I work out at Virgin Active VodaWorld for more than a few years now, so I'm not a new face there, never had a bad incident with them, though today was the first! While working out the manager singled me out and asked me to put on a mask, I was confused as their announcements stated we are allowed to remove our masks when doing vigorous activities provided we are two metres away from others which I was and I did mention that there are so many other people whom are lifting weights with their masks either partially down or off, why was I being the only confronted??? His remark was that he was asking me and not them, which seemed rather off though I did put on a mask what really got me ****ed off, was thereafter other members of the gym. Doing the same workouts as I or whom had no masks on AT ALL, walking about, having conversations and working out were not told ANYTHING By the same manager???? I'm a paying customer just like everyone else so why single me out barking out concerns of covid but let the standard slide with other members of the gym, that's double standard B.S AND NOT COOL! SINCERELY VIRGIN ACTIVE GYM MEMBER!