The Cobalt Rhythm Kings today: from l to r: Greg Benn, Wendell Jones, George Mastrogiannis, Mark Zaretsky.

Cobalt singer/harmonica player Mark Zaretsky performing on the New Haven Green

Cobalt bass player and singer Wendell Jones performing on the New Haven Green

Cobalt guitarist Greg Benn performing on the New Haven Green

Cobalt drummer George Mastrogiannis performing on the Ivoryton Green. Photo by D. Hayne Bayless.

The Cobalt Rhythm Kings --1999-2005 -- l to r: Wendell Jones, Mark Zaretsky, Greg Benn, Gil Hawkins Jr.

Cobalt harp player Mark Zaretsky, left, jams at the 2006 Chicago Blues Festival with Dave Specter, 2nd from left, and Aaron Burton, right. 6/9/2006

Cobalt harp player Mark Zaretsky, left, jams at the 2006 Chicago Blues Festival with Dave Specter, rt, and former IcebreakerAaron Burton -- 6/9/2006

The Cobalt Rhythm Kings perform at the King Biscuit Blues Festival -- Helena, Arkansas -- Oct. 7, 2005

The Cobalt Rhythm Kings perform at the King Biscuit Blues Festival -- Helena, Arkansas -- Oct. 7, 2005

The Cobalt Rhythm Kings -- traveling version -- at the King Biscuit Blues Festival, 10/9/05: Tom Nagy, left, Greg Benn, Mark Zaretsky, Andy Karlock.

Cobalt harp player Mark Zaretsky say hi to Muddy at the Delta Blues Museum, Clarksdale, Miss., 10/9/05

Cobalt harp player Mark Zaretsky has a little jam with Muddy in Muddy's Cabin at the Delta Blues Museum, Clarksdale, Miss., 10/9/05

The Cobalt Rhythm Kings -- Andy Karlock, l, Tom Nagy, Mark Zaretsky and Greg Benn -- at the Delta Blues Museum, Clarksdale, Miss., 10/9/05

Cobalt harp player jams on the street in front of Bluestown Music in Clarksdale, Miss., Oct. 9, 2005.

photo taken by D. Hayne Bayless -- Ivoryton Green, Essex, CT -- July 26, 2006

Photo by Lisa Rich, New Haven Green -- opening for Etta James! -- July 20, 2002.

photo by Joe Moos, taken on the Mississippi Juke Joint Stage, Chicago Blues Festival, Chicago, IL -- June 9, 2006.

photo by Joe Moos, taken on the Mississippi Juke Joint Stage, Chicago Blues Festival, Chicago, IL -- June 9, 2006.

This special traveling version of the band featured Greg Benn, left, Mark Zaretsky, and frequent Cobalt subs, drummer Tom Nagy and bass player Andy Karlock. The King Biscuit Blues Festival, because of a legal dispute, has been forced to change its name to the Arkansas Blues & Heritage Festival -- but it's still The Biscuit to most of us!

This special traveling version of the band featured Greg Benn, left, Mark Zaretsky, and frequent Cobalt subs, drummer Tom Nagy and bass player Andy Karlock. The King Biscuit Blues Festival, because of a legal dispute, has been forced to change its name to the Arkansas Blues & Heritage Festival -- but it's still The Biscuit to most of us!