How do you build a museum of fan art? First you need to get a late-night show. (Then get another one. And then one more, right after that one.) Then cultivate the ardent devotion of a wide fan base, many members of which have unusual artistic talents. Finally, uh, get 127 cups of coffee, some temporary flooring, and an interactive robotic couch sculpture, and go nuts! The Museum of Conan Art — MoCA, if you will — includes 50 pieces of Conan-adoring artwork made by his most ardent viewers and is open at the Time Warner Center until November 3.