Not necessary at all. I tend to peacock on street and tend to dress quite well but my fashion in a gym has always been meh. For some reason, just call it intution I dont have the feeling that girls in the gym are really preoccupied with this. Also not preoccupied with how much you lift. I never saw a meathead swimming in pussy
I believe that a lover vibe in particular is what will bring you the most attention, because most guys in the gym are posturing or doing social circle game, being a "bro" , but lover types are really rare , they are the true competition.
Pre-opening and verbal game with lover vibe is best. An athletic vibe tends to helps as well.
Or perhaps use an accesory which is less tough guy. Dog tags tend to be tough guy.
Anyway these are my views perhaps for you guys something else works better. I tend to view myself like an exotic cat instead a of a big bull or ox, that is how I visualize it basically
ALSO tank top helps a lot during daygame if you have something to show for it, but I never found this to be just as strong in the gym, a little bit maybe. Perhaps because you are competing on the same area with a tanktop as any other gym bro