DanceTunes.org provides a database of music that has been 'tagged' by dance type which you can browse and sort (select "Browse Music" from the homepage).
Become a registered user (By logging in at the home page) to access more features: you can add music (select "Search / Add" from the home page) and rate music (just click on "rate this song" within the description of a song.
Please visit our discussion forums to chat with other dance enthusiasts and to provide feedback.
