Professional blues bass artist, at the time of this photo regularly playing behind the late Koko Taylor, having a little fun during the jam session.

From his myspace page:

[Melvin has played with] Koko Taylor, Billy Branch & the sons of Blues, Carl Weathersby, Lurrie
Bell, Buddy Guy, Byther Smith, Big Time Sharah, Zorra Young, Deitra Farr, Sharon Lewis, Peaches
Staton, Jimmy Burns, Jimmy Prime Time Smith, A.C. Reed, Buddy Scott, Jr. Wells, Magic Slim & the
Tear Dops, Leffty Dizz, and many more.