My husband and I are going to be celebrating our convalidation on May 16th, long story short, we are both cradle Catholics that happen to be returning to the church after getting married, our marriage is not currently recognized by our faith, so we are fixing it. This is not a wedding do-over, we are inviting 30 of our nearest and dearest to celebrate the sacrament and having a nice dinner after.
That being said, my husband and I are part of the church choir, which consists of about a dozen or so people. Of that dozen, three will be receiving formal invitations to the ceremony and dinner because they are the organist, cantor, and reader for our ceremony. The organist has suggested that I invite the remainder of the choir to sing because they are essentially my church family and have all expressed that they would like to do so. I think this is a lovely idea, I just want to host them correctly. It is in our budget to properly host them for dinner after, I just do not know everyone's last names/addresses. Would it be appropriate to give a group invitation?

The truth behind a well laced dress