The 12 bar blues song is a common form in Traditional Jazz and Swing (six 8-counts in each chorus). It is important to note that just because a song is a 12 bar blues, does not mean it is a "blues" song. There is more to the blues than simply form. Shake That Thing, Georgia Grind, Corrina Corrina, and Tight Like That are four good, well-known examples. Please note: sometimes musicians will still play a 12 bar song with an AABA melody line. Once you start to recognize the form you can more actively make your dancing fit not only the pulse and feel of the song but the structure. This will give your dancing the look and feel of choreography while maintaining the spontaneity of improvisation.