This brings to mind something I thought of a couple of years ago.
They have Senior PGA golf, Senior LPGA golf. They talked about Senior Baseball and football leagues, probably with flags.
Why not Senior Nascar?

Think about it, call it the Depends cup! Toss these old ex-racers in Buick Park Avenues and LeSabres, Ford Crown Victorias, and Chevy Caprices, and limit the race to 50 Miles. No in car hydration system, but an incar Cathater or colostomy bag could be susbstituted.
The track could be littered with School crossings, bus stops and Lane Restrictions. The Pace car could either be a golf cart or a Jazzy Scooter, and Pit Road would include a CVS drive-Thru.
Just my .02
Ray