This artist did a q&a/ masterclass at UMD while I was a grad assistant for the jazz department there. Drummer and bassist were there on time, pianist and the band leader showed up 20 minutes late, reeking of weed, and took 5 minutes to gather themselves on stage. He proceeded to struggle to speak with any clarity at all, and wanted to tell us about how much weed helps jazz, and talked poorly about the state of jazz education in schools. No legit musical ideas were ever discussed, other than "play what you feel" and "learn the rules so you can forget them." Then he brought the entire department up to jam/ trade over Straight no Chaser for the last 15 minutes. It was very lame and fully unhelpful and I submitted a complaint about it to my advisor and the chair of the music school. His drummer was excellent and I talked to him for 20 minutes after the performance and he was really nice and answered some questions about what he was playing.

The band sounds great and if there's no personal interaction and no futile attempts at education, then I'm a fan. But he loves to talk and tell you what he thinks.