docs: def listen_many(*rooms):
      """Listen for changes in all registered listeners in all specified rooms"""
  
      rooms = set(r.conn for r in rooms)
      for room in rooms:
          room.validate_listeners()
      with ARBITRATOR.condition:
          while any(r.connected for r in rooms):
              ARBITRATOR.condition.wait()
              rooms = [r for r in rooms if r.run_queues()]
              if not rooms:
                  return