I don't see a problem with it.
I don't go to the gym to pick up women but I respect that they're actually going to the gym, it's attractive to me that they care about their health enough to actually go. They are making the time and money commitment to actually go to the gym and work out.
The only time I talk to them is to help them out with an exercise they are doing wrong. They're always nice about it, too.
If it weren't taboo to try to pick up women there, I would find my ideal woman in the gym.
I purposely wear a tighter Under Armour shirt to show off my muscles for women, I don't see why they can't show off their bodies.
Just enjoy the show