For those who want to know more about Bloomfield, check out the Michael Bloomfield Story (in 10 parts). Part 1:
https://www.youtube.com/watch?v=YJa8KIF1A24
Besides Kooper, people he played with or played with him include: Dylan, Paul Butterfield, Muddy Waters, Janis Joplin, John Hammond, Howlin' Wolf, Buddy Miles, Jefferson Airplane, Barry Goldberg, Yank Rachell, Little Brother Montgomery, Nick Gravenites, Taj Mahal, Mother Earth, Johnny Winter, Junior Wells, Woody Herman, Otis Spann, Harvey Brooks, Dr. John, Lightnin' Hopkins, Big Joe Williams, Rick Grech, Sleepy John Estes, Sam Lay, Harvey Mandel, Beaver & Krause, Elvin Bishop, Mitch Ryder, Moby Grape, Carmine Appice, Brewer & Shipley, and Sunnyland Slim.
http://en.wikipedia.org/wiki/Mike_Bloomfield
He was NOT the astronaut, also named Michael Bloomfield, who flew on three space shuttle missions.
Bloomfield & Butterfield were pals of my friend Al, who was on faculty at University of Chicago, although I never met them.
I'M STILL WAITING ON MY SACD OF SUPPER SESSION!