10 Novembre 2002, First concert at the Cathédrale of Choisy-le-Roi, a Paris suburb.
10 February 2003, participation in the "Voices against AIDS" Concert at the Trianon in Paris
10,11, 12 April 2003 - Participation in "Crazy Evenings" with the Choral group Mélo'men in the St Germain Auditorium
17 et 18 May 2003 - First Anniversary Concert at Espace des Blancs-Manteaux in Paris,
21 June 2003 - Concert at the Gay and Lesgian Center (CGL) of Paris and at Place des Vosges as part of the "Fete de la Musique" in Paris
18 October 2003 - Concert at the Salon Rainbow Attitude at Porte de Versailles
19 February 2004 - Participation in the "Voices against AIDS" concert at the Trianon in Paris.
June 2004 - Fête de la musique dans les jardins du Luxembourg
2 and 3 July 2004 - a small group from the RSO performed at the Salle Adyar with the choral group Melomen
Janvier 2006 and March 2006 - 2 concerts
8 March 2007 - concert at the Paris 19th Arrondissement Town Hall (Mairie du 20ème arrondissement de Paris).
2, 3, and 16 June 2007 - 3 concerts with the choral groups Melo'Men and Romantica de Torcy.

2 and 3 August 2007 - Montréal, Canada, as part of the 1ers Outgames
May 2007 - Concert in Cologne, Germany, "The Sound of Gay Games" , in preparation for the Gay Games 2010.