I think the best way to "woo" someone is to be friends with him/her, without any intention of anything more. The best relationships always stem from friendships, since there's little to no pretense.
But as far as nutty flirting goes... once I was eating in the student union and someone I was just starting to date was walking by outside, saw me, mooned me with the butt flat against the glass next to my table, then just kept walking, without coming inside or anything. That got my attention. And since it was such a nice, cute ass, it got me the envy of everyone else there.
