Used on me by a girl - "Look, I can't really understand you, I'm f**king drunk. If you wanna sh*g me we'll go back to mine now, coz I'm not going to stick around here much longer and I've never been f**ked by a goth before."
It turned out that she was a lot more drunk than she seemed, not only am I not a goth, I just wear a lot of black - she had lost her phone and her keys, and nobody was answering the bell. I took her back to my place, held her hair while she was sick then put her to bed with a note explaining where she was and where I was (sleeping in the lounge) next to a big glass of water.
We neer slept together, but went on a couple of dates, and are firm friends now.
I don't use chat-up lines, mainly because I can't even make them sound funny! I do rely heavily on my smile though 8)