Female wings can work, however perhaps not in the way you're looking for.
They're great because if you're out with a bunch of girls, other girls will try and compete for you, whether they're concious of it or not.
For me, Im in a program at university that is all girls, so when we go out after class, I find myself being approached by other girls more often then not. However, if they know how to wing, then Im sure they can be effective, because they know how other girls think. Ive never had a girl"wing", but I know that bering with a group of women seems to attract attention and competition.
Also, going out with a few couples lets you stand out more as well, as you'll be the only one without a date for the evening..at least for a little bit
Hope this helps,