50 years back little to just a few gambler's tournaments. 40 years back might be a better compasision. other ones was as stu said mostly straight pool and more formal. and a true test of skill.
its more like going to a pro golf event which is of course regulated in every way, and a gamblers golf event . both you see good golf, one is expert the other is fun and exciting.
but two different clientele for the most part went to those events.
and you can be sure it was more fun at the gamblers events. and you sure saw great pool with great comments from the rail, and the players.