Ari Marcopoulos is best known for documenting boyish subcultures from the inside out. His work on professional snowboarding appears in "Transitions and Exits" and his photos on hip-hop--five years of images of the Beastie Boys--in "Pass the Mic." Aaron Rose, who showed Marcopoulos at Alleged Gallery, has said of the artist"s uncanny connection with one set of subjects, a crowd of New York skateboa...