In addition to weekly Monday evening rehearsals, EVO organises around 7 rehearsal weekends each year in preparation for 3 to 5 concerts, often accompanied by an orchestra. Choir members commit to attending rehearsals and preparing independently, using recordings to familiarise themselves with the music in advance. This approach allows rehearsals to progress efficiently, leaving more time to focus on musical interpretation and refinement. 

Led by an active and dedicated committee, EVO places great importance on welcoming and integrating every choir member. Rehearsal weekends, some held outside Geneva, provide opportunities to share meals and build friendships. In this relaxed and friendly atmosphere, members remain committed to a common goal: enjoying the experience of making music together at a demanding and high standard, while remaining an amateur ensemble.