I've been playing with the new version of Masterwork for a few weeks now and just saw my first big organized dance in my newly opened above ground pub. It was a perfect fantasy world scene: two dwarves standing by the wall playing instruments while a naga man bard recited poetry ("Weeeeeelll swing your partner round and round, dip your partner to the ground, swing your partner round again and wriggle like a naga man!")
Eighteen dancers were on the floor in a staggered three by six pattern doing a sort of twisting roundelay with groups of four rotating around a common center but switching off partners. Most were dwarven or naga bards and poets, but one of the fortress mechanics was whooping it up near the center, as well as a white tigerman, a human, and a dwarven mercenary, and a human duke consort. A Pandashi baroness consort watched from the door, a naga man bard and naga woman poet watched from behind the bar, while a human spearman mercenary slept drunkenly in a pile of mugs.
This just made my day and fulfilled all my expectations of opening a fantasy pub/inn. The screenshot I caught was showing the dance/play music icons instead of the individual character tiles the moment I snapped it, which I guess are leaves and armor racks?