Well it is somewhat possible. A friend of mine had a radio script that could play sounds throughout the server via / commands. It could probably be used to play music as well but the add-on is private.
The only method I could think of is spamming music bricks all over the map, playing a very large .wav file using minigame events, or having someone make a radio script. I made one once and it worked somewhat properly, it displayed the message and all but it wouldn't play the sound properly.
EDIT: Also don't ask for my radio script. I'd give it someone to fix but I lost the file when I formatted my drive.
