So I've been to clubs a couple of times and had the 'pre-drink and talk to random girls' experience, but I've have no idea how to replicate the success that some of the friends have with the ladies. And before anyone calls me out, lets not lie to ourselves here that most of the guys that frequent nightclubs are there to 'enjoy the music'.

I noticed that most girls in clubs stick together with their cliques and refuse to interact with others, and blow away guys who approach the group without giving them a chance. Another common sight is a duo or trio of girls who will be dancing away in their own sweet world, and when I approach them, the other girls of the group will ask me to go away. Now I must mention that I'm not ugly or creepy, and would rate myself a 7.5. So back to my question, how do you guys approach girls in clubs?