-- Jonathan Coulton: "Code Monkey" has gained a heavy, cult-of-nerd following. Yay! Join the club tonight at 9 p.m. at Great American Music Hall, 859 O'Farrell; $18. -- The Legend of Billie Jean (1985): And with the power of conviction? There is no sacrifice. The situation? It's a do or die. No one knew that better than Billie Jean Davy. Screens at midnight at the Castro Theatre, Castro and Market Streets; $10. -- Craig......