[Miscguy]

Sounds like you need a wingman, and your stuck in a Maverick, Iceman situation. Be the driver on one of these trips, they start cock blocking, attempt to extract the chick with you and ditch the fuckers. Typically a "never leave a man behind" rule is in effect, but cock blocking and fratracide amongst wingman cannot be condoned.

Another method is to approach a fairly good looking woman who is not actually your intended target. Let them cock block you there whilst you move on to the real objective, and there stuck with the decoy.

Or toss the ball in her court. If your hitting it off and your blocker moves in, excuse yourself politly. "Well, i guess i'll just let you two talk" now pause for a second as you stand up and prep to walk off, (not in a huff, calmly). If you were doing well this new asshat wont stand a chance as hopefully she'll stop you from leaving with the old "wait a second" and she'll blow him off for you. If this works, talk a while longer and then extract her.