I personally use that one a lot too, haha actually I think I've overused it a bit, it works with some girls but I have definately had some who are like what the heck are you talking about and just get more awkward. I think something that is really great to get a conversation going or to get them talking to you is to find maybe some common interest ground, like the other day I was at a region dance and I found out that this girl was a freshman, that she loved to sing and was in the concert choir at school, I told her about me being a Senior in Madrigals (Singing group) at our school and for the rest of the dance she had this big excited smile on her face while we were dancing and we had a great conversation about vocals.