Landmark film, landmark building: Shirley Clarke’s audacious Portrait of Jason, a cornerstone of LGBT filmmaking, screens next Wednesday at the Portage Theater, which was awarded landmark status earlier this month by the City Council Music Box. Jason is the subject of this week’s long review, accompanied by our coverage of the Asian American Showcase at Gene Siskel Film Center. Also recommended this week: About Sunny, a drama about the working-class poor in Las Vegas, with Penelope Ann Miller and Dylan Baker; Fast & Furious 6, the latest installment in the car-porn franchise; Jacquot, Agnes Varda’s 1991 tribute to her husband, director Jacques Demy (The Umbrellas of Cherbourg); What Maisie New, a millennial update of the Henry James novel; and Zoolander, the Ben Stiller comedy we’ve been panning for the past 12 years.