It's called "the pickup line game" and it's very easy (big surprise there, considering it's not a game at all and I just made it up XD):
What song lyric would be a terribly bad/fun/cheesy pickup line for [insert name of vampire here]? Write it in a comment! Spamming is welcomed, even in later days...this is a post you should come back to.XD
I will start, to exemplify.