Josh Margolis began playing drums at the age of five under the tutelage of session drummer Kenny Aronoff (with John Mellencamp) in the family living room. Ten years of both drum and piano lessons followed. After attending Berklee School of Music, he went on to study percussion with Miles Davis' drummer Mino Cinelu and Kenwood Dennard of Sting's band. He has been performing in rock, jazz, and acoustic groups in New York City for the past fifteen years as a drummer, singer and multi-instrumentalist. He has also worked as a live television producer for Jonas Brothers, Anna Nalick, and Switchfoot amongst others. Josh has worked as a BMI composer for ABC News, Martha Stewart Living Television, and FOX Sports. Billboard Magazine and the New York Songwriter's Circle have lauded his songwriting skills. He currently teaches music production in New York City schools through the nonprofit CREATE organization, instructs a rock band class at the Manhattan JCC, and teaches privately. He lives in Boerum Hill with his wife Aimee Good and daughter Matilda, 5.

A native of Eugene, Oregon, Bonham began singing at age 5, playing the violin at 9, and piano at age 14. After transferring to Berklee College of Music to study voice, leaving her full violin scholarship at the University of Southern California behind, she began to write songs on the guitar in 1994. She proved to be a quick study; Her 1996 major label debut, The Burdens of Being Upright (Island), went gold in the US as well as Holland, Australia, and Canada, spawning the hit single "Mother Mother". This lead to a pair of Grammy™ nominations in 1997, as well as an MTV Video Award nomination. She has since toured the world many times and has made television appearances on The Tonight Show with Jay Leno, Late Night with Conan O'Brien, Late Late Show with Craig Furgussen, as well as A & E's Breakfast for the Arts. Her third album "blink the brightest" was released on Rounder Records in 2005 and with that she placed many of the songs in major network TV shows such as Brothers and Sisters, The L Word, The Closer, What About Brian, and Army Wives. Tracy's vocals are featured on various artist's albums such as Aerosmith "Honkin On Bobo" (Columbia 2004), Wayfaring Strangers "This Train" (Rounder 2004), Ron Sexmith's "Whereabouts" (violin – 1999). In 2003 and 2006 she toured extensively with Blue Man Group singing and playing violin in major arenas as their featured guest performer and their opening act. Tracy is currently writing and recording her next album and teaching violin and voice in Brooklyn.

Born in the UK and raised in the West Indies, Peter Brown fronted his first band at age 17 at a Connecticut boarding school. He went on to front and record with two other bands while at university in Miami, Florida. In the nineties Peter began living in NYC, developing as a performer and songwriter,and recording with artists as diverse as Richie Havens, and Cy Curnin of The Fixx. By the middle of the decade Peter was lead singer on tour with Kingstone a NYC based Jazz/Rock and Spoken Word recording group. Peter currently is signed to Fretless Productions Management where he continues to record many national television and radio jingles.

James Joughin began playing recorder, like a lot of kids, at the age of nine, but then soon moved on to study the bassoon. During high school, his interests turned to jazz, pop and rock so he switched to the bass. Suddenly he was popular. After attending the New England Conservatory of Music he worked as a professional sideman, playing bass for Peter Noone (Herman’s Hermits), Lou Christie, Leslie Gore and the Shangri-Las. He has worked extensively as a session musician for numerous artists both in Boston and New York. James currently teaches privately and continues to play professionally as he pursues his Masters in Education at Hunter College.

Tomas got his start in high school studying guitar in Sao Paulo, Brazil, forming a high school band and then it was off to college. Having played in Tucson, AZ, where he got his BA in Psychology with a minor in Electronic Music and Recording, he moved back to Brazil where he was a Warner Brothers artist, touring Brazil with Degradee, a rock band in the Brazilian New Wave Explosion. Playing in several different bands, producing records and teaching music have been his greatest passions. He also has taught Yoga and English as a Second Language. He is currently a teacher, music producer and performer in the New York City area.

Originally from Wilton, CT, Madeleine is a graduate of the Hartt School of Music at the University of Hartford. After receiving a B.M. in cello performance she moved to Boston in June of 2000 where she began working as an assistant to the Concert Coordinator for the Boston Chamber Music Society. An active chamber musician and teacher, Madeleine has both orchestral and choral experience and has worked with students of all levels.

She was the assistant principal cellist of the Rivers Symphony Orchestra in Weston, MA and the cellist of the Larcom String Quartet in Boston. In addition to classical music, Madeleine also blends her vocals and cello into live rock performances at local music venues with various artists. In NYC, Madeleine has collaborated with singers/songwriters LiLi Roquelin and Vanessa Boyd, and assisted several recording projects with Josh Margolis. Madeleine loves making music and brings her joyous energy and humor to every class.

John Brophy is a guitarist/singer/songwriter/instructor from Ann Arbor, Michigan with 25 years’ performance experience. He is an Honors Graduate of Musician’s Institute in Hollywood, and has performed in numerous bands from Los Angeles to Austin to Omaha. He began playing cornet in grade school, but bought an old hollowbody from his brother, picked up an old Stray Cats album, and never looked back. John’s roots are in twangy Rock n’ Roll, with a love for Chet Atkins fingerstyle, country, bluegrass and blues. As one of nine children he has played in numerous family bands, and has also jammed with the Lonesome Strangers and Lee Rocker. John currently lives in Brooklyn with his wife Clare and 2-year-old daughter Josie, where he is an active private instructor.

John Barrett Zinn Gross has been playing the guitar and writing songs for more than 30 years. After a long detour in the family business, he returned to music full-time in 2004, joining Ann Ruckert's Saturday Class and Performer's Workshop. Barrett is a member of NARAS and the Songwriters Guild of America and is currently represented by SESAC. In addition to working with GMC, he is the Executive Director of the Roberta Flack School of Music, performs regularly and teaches guitar as a visiting artist for the Brooklyn Arts Council. Barrett is also enrolled in the Masters' Degree program in Music Education at Hunter College and expects to release his first CD in 2009.