invite them to join with your friends, or somewhere you're going, bring them into your
social circle instead of having them bring you into theirs. and just remind yourself that there's no pressure to be hittin on these girls or tryin to pick them up. Relate to them, when they're in a group, they'll talk about things amongst themselves, and just chime in. become part of the conversation...
or open them...get them talkin about somethin you want, but just cut the thread after a little, and walk away or move about the room...
just be friendly, take an interest in them, relate to them and just be social, don't be weird, or even try hard to make a good impression, it'll come off strange and creepy.
have good energy and from what you said about yourself in the post...be yourself, they'll see a fun guy to hang out with and a connector of social circles who's not trying to hit on them like every other guy, so they'll want to chill more... hope that helps!
Much love,
Dubs