CHICAGO, IL-JUNE 13: John Mayall on June 13th, 1982 at Park West in Chicago, Illinois (Photo by Paul Natkin/WireImage)

CHICAGO, IL-JUNE 13: John McVie, Colin Allen, Mick taylor and John Mayall on June 13th, 1982 at Park West in Chicago, Illinois (Photo by Paul Natkin/WireImage)