1 Corinthians 14:26 - "What then, brothers? When you come together, each one has a hymn, a lesson, a revelation, a tongue, or an interpretation. Let all things be done for building up."
"What is striking in this entire discussion is the absence of any mention of leadership or of anyone who would be responsible for seeing that these guidelines were generally adhered to. The community appears to be left to itself and the Holy Spirit. What is mandatory is that everything aim at edification."
Gordon Fee on 1 Corinthians 14:26 (NICNT, 691)
(For the record, I do believe that churches should appoint overseers and deacons, but Fee's point is striking.)