I recently found Pandora, the free internet music service that lets you choose what kind of music you want to hear. If you haven't tried it yet, go to http://www.pandora.com/ to check it out.
My selections so far are the Beatles, Cher, and Native American. Definitely Retiree-wannabe selections. But they seem to have music for every mood and taste. So if you're into heavy metal or rap, go for it. Meanwhile, I will rock with the Oldies or meditate with the Navajo.