The approach is of little importance with this opener but overall 'alpha' or 'outgoing' body language would be good. What I give here is exactly how I use it, I cannot stress enough the word 'I' in this statement.
Valentine: "Hey guys can I ask you a quick question?".
Before they are afforded time to answer I will usually interject with;
Valentine:" Wait a sec guys you know if there's one thing I hate it's when people make me uncomfortable so what I want you guys to do is flip me the bird the second I make you uncomfortable in the least okay *smile*"
I usually get a laugh at this point or a smile at the least.
Valentine:" Infact you guys don't look like you have enough guts to flip me the bird. C'man go ahead do it, c'maaaaan flip me the bird don't be so shy *laugh*".
When they do flip me the bird I usually pretend like I'm hurt and start to walk off saying "Wow you guys are SO rude! I can't believe you! ".
Valentine: "Neway lemme ask my question cuz I've gotta step off in a second. Tell me; is it true girls give each other makeovers?".
If they go on to ask 'what do you consider a makeover?' then guess what... I'm in the convo! Yippie. If they answer 'no' I will proceed to stay, break that thread and use a different opener (if and only IF I like their energy) or simply eject the set. The only time in which this failed was when an Hb9 (by my standards) told me "I don't know" to which I answered (being an absolute idiot at the time.. blame the fucking vodka boys!) "Oh so you're not a girl then?". She retorted with a look of disgust coupled with "no I'm a guy!" at which point I chuckled (mostly at myself) and walked off.
Usually I will recieve a 'yes' response of some description. "Yea well we do each other's make up sometimes". "Well if we dont' like something about how one of our friends dresses we'll tell her".
Valentine:"Ah I see, sooooo *looking around the group* I bet you were a victim of a makeover right? *pointing to the SHB of the group*.
If she answers 'yes' then I initiate a conversation about what they did to her and continue on to my 'difference between girls and guys' routine.
If I recieve a 'no' (which I secretly hope for everytime so I can role play).
Valentine: "Wow, so I bet you're a fashion guru right? (let her answer) Hey! you know what we're gonna do; we're gonna give me a makeover right now. Listen though you have to be really brutal otherwise I wont believe you. I hate it when people are all nice in my face and give me fake compliments all the time when they don't mean them. C'man go ahead, tell me.
If she doesn't want to give me a makeover I'll ask her friends if she's always "so shy, I mean c'mon she's even afraid to give me a make over, forget it you guys give me one instead."
Note: This can get you BLOWN OUT in the most indiscrete of fashions.
If she does oblige and give me a makeover I'll commend her on her work but tell her 'that's exactly what all my chick friends say but I personally think my look is unique and I'm all about me". After doing that I'll turn to her friends or preferably my wingman.
Valentine: "Hey guys I think I might have found my new fashion stylist, Wow she's really amazing. She even gave me a makeover free. Sadly though I cant take her advice...".
They usually take the bait of the open loop but if they don't we all are in possesion of atleast the most basic of social skills and will be able to start a new thread.... right friends?