Before Eric Clapton was old enough to shave, Elvin Bishop was hanging out in Chicago with the first generation of electric bluesmen. A native of Tulsa, Oklahoma, Bishop brokered a National Merit Scholarship into an education that majored in 12-bar theory, generally off the University of Chicago campus he was enrolled at. When he wasn’t jamming with Muddy Walters or Junior Wells, he was dutifully going on lunch and liquor runs for Hound Dog Taylor.