Bob Koester

Robert Gregg Koester (October 30, 1932 – May 12, 2021) was an American record producer and businessman who was the founder and owner of Delmark Records, a jazz and blues independent record label. He also operated the Jazz Record Mart in Chicago, which he billed as the "World's Largest Jazz and Blues Specialty Store", and later a record store specializing in blues and jazz in Irving Park, Chicago.