I still remember where I was when I learned about JJ Cale for the first time.
I was newly 21 and in Beach, ND, which is a super tiny town, and I went to a bar where this old dude who owned the place had a full band's worth of gear setup in the corner. Nobody else was in the bar, so my friend and I struck up a conversation with the owner. As it turns out, the gear in the corner is for whoever want to jam. I got a massive lesson in blues that night, from "you ever hear of JJ Cale" to "ahhh son, this is how you play the blues". Changed my life.