I came across an App for my iPhone called AccuRadio. They also have a dot com by the same name. They have hundreds of different genres, sub genre, etc to listen to. Check them out at www.accuradio.com
. If you can't find your type of music there is doesn't exist. Although I did email them to find out where the Zydeco section was. Enjoy.
Below is only a sampling up to letter "C"