Midnight Sons Chorus - Anchorage, Alaska chapter of the Barbershop Harmony Society. - http://www.midnightsons.com/
Mall City Chorus - SPEBSQSA chapter from Kalamazoo, Michigan. - http://barbershopharmony.org/
Masters of Harmony - 1990, '93, '96, '99 '02 and '05 International Champions from Santa Fe Springs, California. - http://www.mastersofharmony.org/
Montreal's Island City Chorus - Montreal's oldest Barbershop Chorus. they are looking for men who would like to sing. - http://www.nedistrict.org/Montreal/
Metropolitans - Men's a cappella show chorus hailing from the metro area of Jacksonville, Florida. - http://www.metropolitans.org/
Mount Baker Toppers - Barbershop harmony society chapter in Bellingham, Washington. - http://topperschorus.org/
Millstream Chorus - Bedford/Sackville, Nova Scotia chapter of SPEBSQSA. - http://www.nedistrict.org/millstreamchorus/
Morris Music Men - Morris County New Jersey chapter of the barbershop harmony society. - http://www.morrismusicmen.org/
MegaCity Chorus - All male a cappella group in Toronto who are looking for singers. Newspaper articles, how to join, general information, Details on Singing Valentines, galleries and guestbooks. Members of the Barbershop Harmony Society. - http://www.megacitychorus.com/
Mason Dixon Barbershop Chorus - Find information about performances, how to join, or hiring the Hagerstown, Maryland chapter of SPEBSQSA. - http://www.masondixonchorus.org
Mountainaires - An all male, a capella, multi-part harmony chorus from Clarksburg-Fairmont, West Virginia - http://www.harmonize.com/mountainaires/
Muskoka Music Men - Huntsville Ontario, barbershop chorus. - http://www.muskoka.com/music-men/