Well, a buddy and I went for a visit to a local pub. We steped outstide and walked along the side of the building to get to our vehicle. The side of the building had windows and there were two girls sitting at a table. He turned to where the girls were and gently knocked on the glass to get their attention. They looked at him puzzled, and he blew on the glass to make a fog and then he made a heart with his fingers, looked at both of them and said "Happy Valentine's day" through the glass. Then he did like a yosamaty sam move and made his fingers into guns and fired in the air saying "pow Pow" Winked at em and walked off. I couldn't stop laughing. Id say that broke ice.
A girl I used to work with used a line. "Hey nice shoes,.. wanna do it?" haha it cracked me up.
I like to keep it classy. Can I get you something to drink? On the front, it is harmless, but there is that ever so subtle double entendre in play as well.