I am pretty sure the photo is on the overpass that goes from Poplar down to Union in East Memphis.
Here he is in the late 1970s. The bald guy shredding the guitar on your right was a former tax lawyer.
Here’s more info about the appearance at the Brooks in Memphis. He’s a writer, and is there in part because of a recently published memoir.
h/t to Andria Lisle for the photo.