Vacant for 15 years, landmarked UWS theater holds out hope

Even on a block where the majority of its neighboring buildings are landmarked, the Metro Theater stands out. For one thing, it’s tiny: at just two stories, the Metro is an Art Deco splinter in the foot of the Ariel East, Extell’s 37-story glass tower that’s so tall it made Upper West Siders shriek with dismay when its design was revealed. The theater’s tri-colored, terra cotta façade, which used to advertise showings of adult cinema