The 11:00 Mass is the one with the pipe organ and full choir. I'm not in that choir simply because I didn't want to make the time commitment yet. I sing in the Festival Choir, which sings special Masses like the Masses for the Pastor's 40th and Associate's 25th Anniversaries of Ordination. We also sing the Christmas Midnight Mass with a brief Festival of Lessons and Carols beforehand, and Easter Mass. The organist started the Festival choir because the 11:00 Mass Choir was mostly older folks who didn't want to come out and sing Midnight Mass when our Pastor re-instated it in the mid 90's. We get a great group of folks who are there to sing because we LOVE it, and we are always told how much the music enhances peoples' enjoyment of the Mass. That's what GOOD music is supposed to do.
I have to confess, I have walked out of Mass when they started singing some sort of folk/calypso nonsense. There is not a single hymn written in the last fifty years that does anything but leave me spiritually drained. I am a traditionalist who faithfully attends the Novus Ordo, but there like here, I find very little charity for orthodox Catholic tradition.