The dilemma for the man becomes - does he work to turn the friendship into something more, or work his way into the network? If he works to build something more out of the friendship, he automatically becomes 'off limits' to all of the first girl's friends, regardless of the outcome with the first girl.
Jeff: "I don't wanna know"
Bill: "of course you do! I used the salt shaker method to whack it! It was amazing!"