Then there's parades. Driving slow, weaving around, tossing candy and the required wave. I've taken the Caddy in the Pear Blossom Parade a couple of times and it is quite and experience. A little known tip if you don't have a hard boot to cover your top is to cut a piece of plywood or layer some cardboard under your soft boot to support whoever will be sitting in the back.
Show and shines are those times where classic car owners get together in a parking lot, or a park and display their cars for others to see. Take a picnic and enjoy a sunny day with other people that enjoy their cars. These events are usually sponsored by a local car club and publicised in their newsletters and such.