Very long time between realizing this was a dream, and waking up. At least an hour worth of story played out after I recognized it as a dream:
Travelling with a handful of other musicians in the little blue bus (half-length ex-schoolbus owned by a friend); stopped outside a restaurant, where we recognized the limo of a more famous musician we had a beef with -- he'd stolen something from us, I think. There was some (now too poorly remembered) well-intentioned breaking and entering, an argument in the parking lot, a conversation with a high-end prostitute who had no idea who her very famous client was until we told her, and a bass guitar that was also a sequencer. I remember that at one point I hoped others would keep each other distracted long enough for me to capture the sequence stored in the bass guitar's buffer onto a digital recorder so that I could transcribe it in the back of the bus when we next got moving. Then there was a scene shift, one of those ones with no transition so it felt like a continuation of the same scene, except that we were parked inside a church and surrounded by friendly people. This switch happened mid-download, so while watching the blinky lights on the digital recorder (which took up a half-height rack), I was conversing with the local preacher. He said the tune he was hearing sounded Christian, and I said that it wasn't exactly a Christian tune, but it was a song with a moral. Then I remembered that the lyrics had been written by a Christian (one of the friends on the bus), and said that if they lyrics and the accompaniment were both written by Christians and it had an intentionally moral message, I guess we should consider it a Christian song after all.
A great many details unremembered, and too many shifting plot elements to keep track of in just-waking haze. As too often seems to be the case, I woke up not remembering the tune that in the dream I was so desparate to capture and preserve.
(Thinking a bit more about one phrase from what I just wrote ... I have a real-life story where the phrase "well-intentioned breaking and entering" is an even better fit. It's probably safe to tell by now, but I'll write that some other time.)