Rodney Ascher’s Room 237 (B-), the documentary about eccentric conspiracy theories around Stanley Kubrick’s The Shining, is an intriguing dissection of one puzzling, polarizing movie. Despite the crazy rabbit holes ranging from the film being a subliminal meditation on genocide or a cover-up for the director’s alleged involvement in a fake lunar landing, the proceedings and format are all a bit silly. Movie buffs may still get a kick out of it.