It's multicast, not broadcast (which means the networks could still be separated, among other things), and it's not too surprising that the network for the entertainment system carries this (by today's standard) low bandwidth stream.
Yeah, with a better/better configured switch it could not reach the individual client unless it subscribed to the multicast stream, but again, who cares about that low bandwidth stream... you should not trust any hotel network anyway, those audio packets won't do extra harm.
Yeah, with a better/better configured switch it could not reach the individual client unless it subscribed to the multicast stream, but again, who cares about that low bandwidth stream... you should not trust any hotel network anyway, those audio packets won't do extra harm.