ANSWER: Singing groups are not authorized anywhere in the scriptures! One of the problems in Corinth was that many members of the church with various gifts of the Holy Spirit were speaking at the same time and were, by that, causing confusing and disorderly services. Paul states in the thirty-third verse that God is not the author of such confusion, and in verse forty, that all things were to be done decently and in order. So that there might be order, He directs in verse twenty-seven that no more than two or three sentences were to be uttered at one time, and then by only one person at a time. The passage does not deal with music at all and, therefore, does not authorize singing groups of any kind!