the problem is the drop a quarter play a song jukeboxes.
You can jailbreak those to run off your own music subscription, and still have bar goers drop in money to play songs. You still technically payed for the music, but you cant profit off someone else's intellectual property without permission.
The record industry considers that stealing music, and thats what they have people go around looking for. I personally think its some BS but also torn on the subject (the going around snooping part is total bullshit and uncalled for, even though as a musician i actually agree you shouldn't be able to profit off my intellectual property without my permission, even if you bought it on a physical CD or storage medium that does blong to you, im not gonna hunt you down and snoop you out about it though lmao.)