That Chuck Berry Concerto in B Goode is good but I wonder if that's not too different than just hearing free jams like the Grateful Dead do.
When Berry liked to jam, he kept it a
lot tighter: he didn't really hang with more freewheeling improvisors. You notice
in "Concerto in B Goode" the rhythm section didn't veer off the elemental groove or the basic structure Berry set out.
The Butterfield Blues Band's ("East-West"), the Grateful Dead's, Cream's, Mike Bloomfield and Al Kooper's (
Super Session),
the Allman Brothers Band's, or the jazz avant garde's kind of group improvisation wasn't programmed into his software.
I found this pair of jams between Berry and Bo Diddley, originally turning up on an album the two did in the 1960s called
Two Great Guitars but lately part of a Berry box set,
You Never Can Tell: His Complete Chess Recordings, 1960-66:
Chuck Berry and Bo Diddley, "Chuck's Beat"Chuck Berry and Bo Diddley, "Bo's Beat"