The group was founded in 1979,[1][2] and today is, along with Seattle Women's Chorus, the largest community choral organization in North America.
[10] In the spring of 1980, the first official SMC concert was held at the Museum of History and Industry.
[10][11] SMC became a founding member of the GALA Choruses when it was incorporated in July 1983.
[12] SMC performs several regularly scheduled concerts each year, regularly hosting celebrity guests such as Kristin Chenoweth, Tituss Burgess, Leslie Jordan, Kelli O'Hara, Betty Buckley and Debbie Reynolds, to name but a few.
Legacy contained two original compositions that honored gay figures: I Am Harvey Milk, written by Andrew Lippa about San Francisco politician and activist Harvey Milk, and the Tyler Suite about Rutgers student Tyler Clementi.