If it's Friday, you'll find Jack Myers playing tennis.
"We have 16 now we play four courts, doubles and it's really great. And like I said you know it's the most important thing I do I think for my mental and physical health," said Grandpa Jack Myers.
For decades, this group of 16 has been playing tennis together. It's a sport they enjoy but also keeps them young.
"You know, I'd like to think that tennis is sport of a lifetime. I think it keeps them active, keeps them healthy, not only physically but mentally," said Bill Wissinger, owner and managing director of the Tennis Club.
Jack is their oldest member of the "Young at Heart" tennis team at 90 years young.
And it's an activity he shares with his son.
"It's pretty special and kind of unusual. Me at 70 and him at 90 and we play twice a week so its' unusual but we'll continue on as long as we can," said Ron Myers, Jack's son, who's 70-years-old
Jack says the secret to living such a full life is simple, the three A's - attitude, activity and association with good people.
"You know I love life too. Every morning I get up and I'm just excited about what I'm going to do," said Grandpa Jack. "Be as active as you can be and exercise your body and your brain. You know and that's what I do."
After finishing their matches, this group trades in their hearty exercise for hearty conversation.
"Oh yeah, we go to lunch afterward and we talk about everything, all the issues in the world you know and we try to stay off of religion and politics. But we get into that sometimes," said Grandpa Jack.
As a great-great grandfather, one of the most important things to Jack is his family.
"And I would say that would be my most important thing in life is to be a good father and grandfather and I try my best to be that," said Grandpa Jack.
And affectionally known as Grandpa Jack, he's teaching us all how to be young at heart.
Jack said they're always looking for new players and substitutes to join the tennis team, the only requirement is that you must be 60 years or older.
Jack will be turning 91 years old this June.