I used to watch them on cable in MO, but haven't had or wanted cable since then. Youtube has a pretty good variety, but alas, none of the best of the best. You can find Cary Grant, but not The Philadelphia Story, for example.

Anyway, yes, all of those were part of my childhood too. Also, Fred Astaire, Bing Crosby, Bob Hope, and Mae West. Today's movies are tech marvels and acting wizards, but the innocence and charm of the old ones still has value.