In the U.S. at least, most jurisdictions will require the music to be shut off in an emergency -- namely, if the fire alarm goes off. Audio sources commonly are required to have a relay/GPIO input that triggers the shutoff, a network command is not good enough (network switches typically not being life safety rated).
In this hotel scenario, you have one audio source that can be located in a location that can be conveniently tied into the fire alarm relay panel. Stop the audio there and you've stopped it everywhere.
In this hotel scenario, you have one audio source that can be located in a location that can be conveniently tied into the fire alarm relay panel. Stop the audio there and you've stopped it everywhere.