What about having a new subcategory under Members for Playlists?
They could be individual playlists or collaborative. One topic per playlist, with the playlist located at the top post (wiki-enabled) and the comments for discussion. Only music hosted in fair ad autonomous platforms, as a way to highlight social music and music makers.
This idea came up while thinking about a new TSMN topic on playlists, how basic and important they are for music & artists selection and discovery, and yet how difficult it is to make them and to find them in our context. This hidden subcategory here would not be the solution to this problem, but at least we could offer a place to start creating and collecting these playlists here.