Photo: Jack Califano for New York Magazine One of the loudest places in New York before 10 a.m. is perhaps the Brooklyn Basketball Training Center, especially on days high-schoolers come to visit. One recent Tuesday morning, 50-odd teens from Cristo Rey Brooklyn High School in East Flatbush are warming up, yapping with one another while stretching their quads or screaming “I’m LeBron James, literally, y’all!” after sinking a free throw.