Update:
Boomerang has now been addressed for a third time with no room for interpretation or error. This was handled on an off day, discreetly and behind the scenes. Apparently he texted BL#1 to find out what the weekend's schedule would be, basically trolling for an invitation. Though she preferred not to handle the termination via text, she was on the hook at that moment. I was copied on the text she returned. It was a civil, concise, well-worded explanation of exactly why he would no longer be a member of the group. No nonsense, no corners cut, no half truths. She shot it perfectly straight.
His response was to immediately throw himself on her mercy, sputtering that "a little thing" like this shouldn't come between them. (Little thing? Really?) That was followed by several more emotional overtures and guilt-trippy nonsense about how he needs this, it's all he has, woe is me, etc. (Narrator's note: this is crap. He plays several area jams and has a couple other groups he sits in with - ours just happened to be the only one that ever paid him anything.) BL#1 didn't budge. And so, Boomerang abandoned that route and called BL#2 to plead his case - the very same guy he repeatedly wanted to have on stage pissing contests with - just like a child trying to split two parents. This had the predictable effect of stirring up a bit of conflict between the BLs, particularly because they hadn't yet discussed exactly how this was going to be handled. In typical fashion, though, they resolved that problem within the hour. They have never let anything stew between them for very long, and this was no exception.
Tomorrow BL#2 is apparently meeting Boomerang for a face-to-face, at which time the final axe will theoretically drop.
Butter that popcorn, pull up a chair, and dim the lights. And, yes, as has been implied in many posts on this thread, this is a real-time example of what happens when otherwise decent, friendly people give others too much rope.