Not in my experience, I see a lot of these metro guys in the gym trying to put muscle on, most give up after a few weeks.They always without fail ask me for tips on building muscle . I reckon some, not all are metro because their bodies can't take it and are girly men. Makes me laugh thinking they give off this camp attitude but secretly go to the gym as they are not happy with themselves. I wonder if going to the gym for them is like a married man entering a gay bathhouse ? Do his metro mates know he goes there to butch up? I actually don't mind the guys who are camp and proud of it however. In fact a mate of mine is a bit like that.
I think a lot of girls see them as unthreatening and like other girls but with penis's,but I still get the feeling that many girls like muscles, Iam not short of attention, could be my confidence has increased since working out but before I put muscle on I get much less notice.
Also .I often find that guys who lack attention and interest from women,look at other guys with girls and automatically assume that it's their physique or style that is the reason, that the grass is greener. It is far more important to be comfortable with yourself, I suspect those metro guys I was talking about have seem jock type guys with women all over them and think building muscle will get them girls. Unless you are ugly, obese or have personal hygene issues there is no reason you can't get girls either.