sometimes when im in public and i want to listen to a song, i play a song really quietly on my phone and hold my phone up to my ear so it looks like im talking to someone (on the phone) but really im secretly listening to a song.  have you ever done anything like this?
that works ok for checking a song (although not including anything in the bass range) but if i want to really listen (or even just check something in the bass range) i'm gonna need headphones