Distinct from the venue and DJ scene within FFXIV, there are bards who are really in it for the music and pushing the limits of what the performance system enables them to do. And they love to get together for jam sessions and to show their latest as much as musicians do in real life. At least some of those spill over into being public events. They're pretty small as far as events go, just little pop-up jams and concerts, but there are player organizers behind them so would you count those?