Sadly the mass loss of young life in the night club in Crans Montana is not the first such tragedy, with PBS collecting some past examples: https://www.pbs.org/newshour/world/a-look-at-some-of-the-worst-fires-in-bars-nightclubs-and-music-venues There was also this one in Rouen, France: https://fr.wikipedia.org/wiki/Incendie_du_Cuba_Libre. The similarities are striking

Fire Sprinkler International 2025, held last week in Salzburg, Austria, attracted record numbers of delegates and exhibitors. 460 attended the event in the Salzburg Congress, hearing about the latest innovations in water-based fire protection. Top international speakers presented their research