Three times, I have lured my husband to Film Forum -- for "Ninotchka," "The Third Man," and "Sunset Boulevard." There are unwritten codes in this space; if my spouse took me to a football game, I would expect to follow meticulous directions, and at Film Forum, the roles are just reversed. For example, an unstated rule: You do not try to use the men's room after 1 pm on the weekend. Also: The front row is actually fine. Also: It doesn't matter if the film is seventy years old. On a Saturday, it will sell out . These are things I've learned the hard way -- through trial and error -- and I'm proud of the learning I've accomplished. Seeing "Sunset Boulevard" with an appreciative crowd -- with a functional sound system -- you can't beat this. My spouse enjoyed the "gay" lines: "You there, why are you so late?" "Why not try the vicuña? If the lady's paying..." "I *am* big. It's ...