Because I got into Hi-Fi at a relatively early age, I didn't attend a lot of live concerts. But being from Chicago (well, Evanston), I have strong memories of seeing Al Jarreau live a couple of times at Blues clubs near Wrigley field. This was in the mid-'70s, around the time that he released his first album, so he wasn't widely known yet, and the performances were in intimate settings.
The combination of his unique style, outstanding talent and remarkable enthusiasm, had a real impact on me, and I won't forget the experiences.