I don't quite fit the criteria, but I seldom ever learn a song without it having been a request from somebody, or I just happen to hear one that inspires me. And, when I do, I seldom memorize anything except the chord structure, the words, and a signature "lick" if there is one.
All my solos are just improvised on the spot, for better or for worse.
I think after I quit getting paid, I won't be learning any new songs, after that being an important part of my life for more than 50 years. That's sort of sad. I'm proud of you for the work you're doing with your friends. It will keep you young!