Spread over three institutions — the Bronx Museum of the Arts; El Museo del Barrio in East Harlem; and Loisaida Inc., a cultural center in the East Village — this show departs from straight political history by presenting the Young Lords as a cultural phenomenon as well as an ideological one, with a highly developed instinct for visual self-projection, right down to having an official party photographer, the gifted Hiram Maristany.