The Atomic City Rollergirls' season opener with the Seattle Sonic Boom roller derby team is at 6 p.m. March 16 at the Toyota Arena, next to the Toyota Center in Kennewick. Doors open at 5 p.m. Admission is $10 for adults, $8 for seniors, military and children age 5 to 13. A portion of the proceeds will be donated to the Habitat for Humanity organization.