Back in the day...
I've previously organised shows and workshops for Tura New Music, including their iMprov workshop program and Club Zho series, and incidental shows in the Totally Huge New Music Festival..
iMprov was described by Eduardo Cossio in ADSR Zine in this way: "[iMprov] fostered exchange with local and visiting artists from different backgrounds. The safe environment of the workshops did much to enable the individual practice of its participants."
My perspective is biased, but my personal understanding of iMprov - as a facilitator, but always also as a learning participant of the workshops - was that it created space for a small group of folks who had an interest in improvised music but no idea of a "scene" or "community" for it, to meet and form that exact scene. In the years the program was running, Perth went from a place with only a handful of ongoing groups or projects playing free improvisation, to one with dozens of them. Many of these collaborations, even if they have changed names or have in-flux lineups, are still going.
I also put on a lot of one-off shows, including After / Before, which you can read a review of here.