Generally, when I get into that situation (I tend to hang with a group of guy friends, then when they start chatting to a group of girls etc), I tend to more just step back and watch with some amusement from the side lines, not joining either party.
These days I'm very secure in myself, and also very independent from others - so if a group of friends is participating in an activity that is outside my comprehension/I have no interest in, I step aside for a while and either observe and be entertained, or go and do my own thing. People will be people, and in the end you have to love them for their eccentricities and quirks - especially when it comes down to flirting.
It's sort of like when peacocks try to attract mates by showing their feathers; their actions make sense biologically. Guys do it by changing the way they talk and showing off, girls do it by doing up all the hair and make-up and stuff, and acting all shy and giggly and delicate.
The problem with/the good thing about (depending on what way you look at it) aspies is that we tend to just be ourselves regardless.
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Into the dark...