Square dancing requires at least eight people to dance and one person to call.

A professional caller keeps the crowd moving and smiling.

Square Dance Caller Bill Fox said, "Square dancing is just something that's a lot of fun and it doesn't cost you an arm and a leg."

They keep their arms and their legs and their feet moving at the Square Dance Center in downtown Knoxville.

Jean Gibson started dancing almost 20 years ago.

"I was a single parent. I got out of the house and started square dancing and I've square danced ever since," she said.

"You say 'wow, she's really here; she has really made it,'" John Matson recalled Friday -- just 24 hours since returning from London to watch his former student in the pinnacle of her career.

Lenior City native Claire Donahue competed in the 100 meter butterfly in the 2012 Olympics last Sunday. Friday, she helped the U.S. women's team get to the finals of the 400 meter relay.

It has been a long road to get to the London Aquatics Centre for the 23-year-old, a road that began in Blount County. That's where Matson first met Donahue more than a decade ago.