You separated out the BS threads (thank-you!) so could you make categories like:
Lyric posts and Requests
Events, Festivals and Regional Gatherings
Chords/Music posts and Requests
Music chat

Difficult...

Example: someone has bieen to a gathering where he heard a song, so he asks in the "after the gathering" thread for the song.

Should the Thread that was in the "Events, Festivals and Regional Gatherings" category now be shifted to the "Lyrics Request" category?

Then, after the lyrics have been provided in that thread, someone asks for the tune and chords for that song. Should the thread now be shifted to the "Chords/Music posts and Requests" category?

Things like these happen quite often...