As someone who dislikes boomboxes in public, I have to say bikes are the one place where I think playing loud(ish) music makes sense. Unlike cars, bikes are ve

As someone who dislikes boomboxes in public, I have to say bikes are the one place where I think playing loud(ish) music makes sense. Unlike cars, bikes are very quiet and if a pedestrian comes out jaywalking from between parked cars, the biker might not have enough time to react and ring their bell. By the time a bell rings, the collision is imminent. Music can be heard from far enough that a jaywalker can avoid the collision path preemptively.