These are 3 of my own situational openers.
They make use of Cocky&Funny as a 'core' method of attraction.
I'll also tell you how to transition from the opener.
Opener no 1 - If she's sitting alone.
____________________________________________________________________
You : "I'm not getting paid till next week so it looks like you're buying."
HB : "Hahaha no!"
*If she smiled ...proceed*
Look at her with a curious facial expression on your face.
Gently touch her shoulders and turn her body language towards you.
As you turn her shoulders to face you , your shoulders should do the same, almost symmetrical.
Obviously she'll see this as an IOI so you'll have to throw in a neg. :
You : "Do you know how beautiful you'd look with blonde/brunette hair?"
HB : "uhm...thanks.."
You : "Maybe you'll make up for it in personality;)" *While smiling*
CONTINUE GAMING NATURALLY.
___________________________________________________________________
Opener 2 - When she's with friends.(No guys)
The trick is to be extremely comfortable and flirtatious.. be charismatic and friendly. If you do not have enough confidence while doing this it will totally backfire.
Walk past , look over your shoulder , walk into the middle of the group and say the following.
You : "Hey just so we're all clear on the rules here... you guys don't look at my ass without permission... you don't talk about how handsome I am behind my back and you most definitely do not try to get me into bed after the first night... now that that's over.... hi I'm Energetica
*friendly smile* 
. "
You "I actually can't believe I was able to throw myself around like that without you guys going all 'bitch' on me.. I guess you're the 'good girl' group around here:D *smiling*."
You : "Who are you people anyways?"
Them : "I'm **** , she's **** , that's **** and her name is ****"
You : "Okay well I'm not going to remember all those names so I'm numbering you guys. 1 ,2 ,3 ,4....all done : )"
CONTINUE GAMING NATURALLY
__________________________________________________________________
Opener no 3 - With guys
Walk past the set, look over your shoulder , tap one guy on his shoulder and say the following :
You : "You better watch it man! I can see these girls are baaaaad news. Especially that one. " *Point at a random girl*
The group will laugh. You walk away and go buy a drink.
You open another group and then return to your original group.
You : "Didn't I warn you about these girls? They're bad news"
You : "Who are they anyways?" *asking the GUY*
He'll introduce you to the girls and you can continue gaming naturally.
The idea is to create the "buddy-buddy" vibe with one of the guys.
__________________________________________________________________