I've seen plenty, and I love your alias, prodigy was one of my favorite bands, this is simply why im replying to you.
Shy sets or groups of people are great, as they will generally leak onto the person who is having the best time. They are like Tofu, or rice, if you put any ingredient in there, they will blend with it.
So walk up and hold 90% or 100% of the conversation, have fun, tease them, talk to them, and walk away from them, make them miss you a little, come back, and always be in charge of the interaction, make it as if your the man and they are the orbiters! So when you ask for the number later, act as if you will get it and a date after that! and you'll be well off.
Shy groups are great,because you get to dictate the interaction really easily! If you want to get some emotion of the girl just pick her up and spin her a little, you'd be surprised how red faced shed go and start smiling and braking out in little red flushes!
your on the ball, keep up the good work!