How can I get my s4 mini to play music through napster and blue and me?

I have a 2011 bravo.

I could be wrong, but I don't think Blue and Me supports streaming music - sorry

No it can't. Half the threads in the blue and me section mention this

It works fine through the iPad via napster just a bit bulky. Just doesn't work with the s4

Via Bluetooth? The sound quality would be terrible. Apple devices can play over USB fine (or with an adapter when needed) but newer android phones can't. You should by a £10 USB stick instead