The Montgomery County Coalition for the Homeless, a nonprofit providing permanent housing, intermediate housing, emergency shelter and supportive services for the homeless, will kick off the Fannie Mae Help the Homeless program with a Shelter Walk ‘n’ Roll event. From 1 to 3 p.m., Sunday at Rockville Town Square, 100 Gibbs St., attendees can participate in family activities and hear live music by acoustic rock duo Jack Worthington and Neal Herron. Registration costs $30 for adults and $20 for youth. For information, visit www.mcch.net or call 301-917-6654.