Zumba classes a hit with seniors

But when she does hit the play button, releasing Latin beats as contagious as her grin, that's when the real fun begins.

Energized by the rhythm, the residents — most sitting down or in wheelchairs — swing their arms, pump their fists and stretch from side to side. It's not exercise. It's a dance party.

“I love it. I love everything about it,” said resident Gerry Sweeney, 80. “I look at her and just can't help but smile.”

Sweeney said that despite two artificial hips, she's able to get a good workout during the Zumba sessions.

Collier, a certified instructor, says the sessions are modified so anyone at any age or ability level can follow along.

“You can't do it wrong,” Collier said. “The goal is just to move and enjoy yourself. And this music makes you want to move.”