Hey man, welcome to the board. I'm new too
My social circle game is pretty good, just my cold-approach game is not so hot. What are you having trouble with specifically?
In general you just wanna hang around and be cool. Do all the stuff up to escalating sexually but never make the move... Just build and build the tension with the girls. That, combined with them spending quite a bit of time with you, usually gets them into you in my experience.
Its more a question of not doing anything to mess things up (by being weak/needy/afc/desperate/boring/beta/etc.).
You also wanna become the leader (if you are not already). This can be tricky if the group is already established, be prepared to enter into verbal skirmishes with the more alpha guys. Don't worry tho, its good practice for other AMOGs you may encounter
Want any more specific info just give me a shout.