My English is lame, I'm sorry, but if you don't mind, I'd like to share my experiences.
I guess it's a little different here in Brasil. Although I think the guitar player (a boy) and the drummer (a girl) get more groupies (girls) than me, I can say I have my (nice) share. I've noticed they are younger (I mean 17-25); they say all kinds of nice stuff about you and your band, they want to buy the record, the t-shirt, everything... I think, in my experience, older men are actually intimidated by women on stage.