There aren't many genuinely free-form radio stations left in the country. I have the good fortune to live in listening distance of two, but you're probably not so lucky.
If you're a music geek, I suggest that you tune in, NOW, to KUSF, which the way things are going is about to be one of the deceased freeform stations. A nationwide simulcast / death watch is going on. Because the University of San Francisco kicked all of the students out and sold the license to a commercial broadcaster. A shame. It was a great station, and a far better (and cheaper) investment of someone's donations
California's tax dollars than the $350,00 annual Los Angeles calligraphy budget, in that, you know, it actually trained engineers and radio voice talent, for approximately no money at all.
If you're a music geek cynic, you'll mourn. If you're an optimist, you'll listen and hope. Either way, go to this site and listen now. Trust me, it's better than the pap Clear Channel's offering.
If you can't find the simulcast on the KUSF site, google WXYC, WFMU, or WXDU, all of which are running it.