Office life is annoying enough when it comes to sharing space with humans you would not otherwise choose to share with. Listening to radio or music without headphones just adds to the aggravation and I think the kind of music is totally irrelevant. If I were his manager I'd have already told him to use headphones or turn it off.

Office manners are like airplane manners I think; the goal should be to avoid inflicting noise, visual and olfactory pollution on one's co-workers.