The annual Brockton After Dark program for youths ages 13 to 20 kicks off Monday. In its ninth year, the program provides free athletic and other activities weeknights through Aug. 24 at sites throughout the city. Activities include basketball, tennis, swimming, coaching, digital and traditional art, soccer, hip hop dances, zumba, boxing, volleyball, movies, and Champions for Change, which introduces youths to public service. Food is offered at most sites. To register, visit www.brockton.ma.us. For more information, call the mayor's office at 508-580-7123.