Good music can attract people to the church. I loved singing in the choir growing up in the church. We put on a lovely cantata one Palm Sunday, but we don’t have a choir anymore. I do miss that. I sang in a number of choral groups in the past, too. They were lots of fun and the music was varied and wonderful. I especially liked the Messiah.
The chorus at my daughter's high school (I also graduated from there many, many years ago!) does a grand performance of Messiah (Part the First, plus the Hallelujah Chorus) the evening before Christmas vacation starts.
Parents and alumni (at least, those who can read music and sing) are invited to grab a score and rehearse (and perform) with the kids. It is a great deal of fun. Cast of hundreds, plus an orchestra and a harpsichord (well, really, an electronic keyboard set on 'harpsichord'). The singers from the small touring chorus plus an occasional ringer sing the solos.
We always have a very good time.