Jeff Sipe, besides being one hell of a great drummer, is a pivotal figure spanning a variety of genres, including Southern rock, jam bands, avant-garde rock, avant-garde jazz, and even progressive bluegrass. No wonder that, when Sipe throws one of his semi-annual Zambiland Orchestra events, just about everyone in Atlanta who plays a musical instrument shows up. For years the drummer was best known as Apt. Q258 -- those in the know called him "Apartment" for short -- and was associated primarily with the shenanigans of brilliant bandleader, instrumentalist, and singer Colonel B...