Education, health and community leaders have agreed to open some Los Angeles school campuses after hours so that families will have a safe place to exercise. The new program, named JUGAR, the Spanish word for “play,” aims to turn schools into community hubs, where residents can participate in aerobics classes, walking clubs and other activities that promote health. “We don’t want the families to see this as only a Monday-to-Friday place,” said Alex Avila, one of the school’s principals. “We want the community to feel welcome always.”