My two cents:
Who gives a damn about the group? Are you gonna pick them all up? No. Are you gonna have sex with them all? No.*
Look, aknowledge the group, say hi to them, maybe shake hands with the Alpha's or whatever, but focus on your target! You don't have to win over the entire group, just your target.**
Don't become some dancing monkey trying to impress everyone. Impress your target!
* Well, unless they're all hot chicks, then you might try to have an orgy
** People think that if you win over the group, the target will be more willing to accept you, but I'm sure it works the other way aswell: Win over the target, and the group will accept you. You have already been "social-proofed" by a member (your target) of the group, and therefore you're "ok".