Music from the 1960's and early 1970's, whereas most of the lead singers have all died from a drug overdose.
Newer bands, that are not popular, also known to some as indie music.
Nothing with loud drums that might increase blood pressure.
Granola Rock music is enjoyed by many hippies/tree huggers, while bragging on their extreme enviromentalist behavior, and comparing who gets the greatest milage out of their Pruis.
Michelle spends her day caring for her behive and thinking of ways to recycle anything and everything, all the while, listening to her granola Rock music on her 8 track.