"How is it then, brethren? when ye come together, every one of you hath a psalm, hath a doctrine, hath a tongue, hath a revelation, hath an interpretation. Let all things be done unto edifying." (I Cor 14: 26)
The above quote from Paul described his vision of Christian gatherings, not formalized, allowing for extraordinary inspiration, no settling in to a predefined routine. Without active participation, this approach goes bust in no time!