When I first joined an antique car club, slow races were very popular .So were potato spearing contests where the passenger hung out the window with a broom handle equipped with 4 inch spike taped on the end ,trying to "nail" potatoes on the ground. My favorite was the teeter-totter, a specially built car trailer with the wheels removed, onto which you drive your vehicle until it started to tip and you would (hopefully) stop on the balance point. My '46 Chevy one ton pickup was especially good at the first and last events with it's "bull low" gear !
I think the changing evolution of 'driveable' has had a lot to do with the demise in interest in a lot of this older iron. I'm not that old, and I had a coworker who would drive his Model T to work. Now if your car can't do 80, corner well, and stop on a dime, it's a road hazard... and if it can't be driven, it makes it a lot harder to enjoy