Am I perhaps the only guy who says that PU for girls is usefull?
I have a good female friend, she is somewhat like a 7. She is very fun and easy going, and is someone who talks easy about anything of sex with guys.
She is very into guys, especialy hot guys and models, but she is not a slut at all.
Sometimes when she goes out, she says to me in advance "i'm going to kiss 2 guys". Few days after, she comes back, telling me she only kissed one guy, but to compensate that, she also kissed a girl

(just for the fun of it).
Then she brings out her iPhone, shows me these pictures of a good looking player dude with a girlfriend, only to show me many text messages of him which are so AFC.
I often call her a player now

.
She has now a boyfriend with whom she is very happy (she initiated their first kiss :p).
Beside of that, guys do judge a lot by looks. But if girls are too easy, they just seduce her, fuck her, dump her, and bragg about her to his friends.
I can believe that many girls don't want to be treated that way.
That's why game is usefull to girls, it teaches them how to make guys work harder for her and a relation. People value things more that are scarce to get.
"Push and pull" is a technique which many girls naturally use, especially the hot arrogant girls who likes her pets and to be adored. I've been push & pulled quite a lot by girls in the past and I remember how much I hated it, because it was so damn effective. I got many oneitis because of that.
I shouldn't recomend girls to use it always, but if there is this player dude, who has a reputation of having a lot of girls regularly, using push and pull to make him work for you may make him more faithfull (he will not dump someone for who he has fought so hard for).
Think of Style's girlfriend Lisa in "The Game": she is a perfect example of a female player.