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BLUE RHYTHM SANDWICH coalesced into a band in 2012, out of the NYC blues jam scene.  Leigh Harrison (vocals, guitar, percussion) and Bobby Perfect (guitar, vocals) had been playing as a duo for many years, and had worked together in numerous bands.
Both Leigh and Bob had performed with Aaron Comins (keyboards, sax) during that time.  At NYC's watering hole, Local 269, which hosted blues jam sessions, they all met Dave Gerstein (bass) and Lyall Croft (drums), who shared their love for the blues, classic rock, country, pop, R'n'B, and rockabilly.
Dave, Aaron, Leigh, Lyall, and Bob at a rehearsal on August 23, 2017 at UltraSound Studios in NYC.
Photo Credit:  Jeff West
Photo Archive
Bobby Perfect at UltraSound Studios, NYC
Bobby Perfect at UltraSound Studios, NYC
Aaron Comins at UltraSound Studios, NYC
Aaron Comins at UltraSound Studios, NYC
Photo Credit:  Madeline Artenberg
Blue Rhythm Sandwich performing at Desmond's Tavern, NYC --
(L to R): Bobby, Leigh, Lyall, Aaron, and Dave.
Photo Credit:  Su Polo
Band members of Blue Rhythm Sandwich (L to R): Dave, Aaron, Leigh, Lyall, and Bob, after a rehearsal in August, 2017, at UltraSound Studios in NYC.
Photo Credit:  Jeff West
Blue Rhythm Sandwich (L to R): Bobby, Lyall, Dave, Leigh and Aaron, on Feb. 24, 2017, at Desmond's Tavern, NYC.
Blue Rhythm Sandwich (L to R): Bobby, Leigh, Lyall, Dave and Aaron, on April 15, 2016, at Desmond's Tavern, NYC.
From left:   Aaron, Bobby, Leigh, Lyall, Dave in 2014 at Neir's Tavern, Woodhaven, NY.
Photo Credit:  George Schillinger
Bobby Perfect at AM Studios, NYC Dec. 2013
All these archived photos show Blue Rhythm Sandwich during their rehearsals at NYC's UltraSound Studio or AM Rehearsal Studios, or at live performances at Desmond's Tavern or Neirs' Tavern.  Aaron worked with BLUE RHYTHM SANDWICH as their keyboard player until moving on to other projects.
Most of the photos of BLUE RHYTHM SANDWICH show them from 2012 to early 2018 when they were a 5-piece band, with their friend, Aaron Comins, who played keyboards and saxophone with them.