I have to be the world's worst guy when it comes to the ability to let girls know I'm interested in them. Let me give you a short story: Last week I was at a party chatting with this girl. She was attractive, and it seemed like we were having some fun. She eventually left to party after a long conversation. I wanted to let her know I was interested in her, but I just don't have those tools. Hell, there's gotta be a better way to ask for a phone number than asking for it outright. Put yourself in her shoes, what would you have liked to hear?