"Ska is dance music, first and foremost. Ska was a Jamaican dance music that swept out of Jamaica in
the early 1960s to shake the butts of working and middle-class Jamaicans before going on, via the West
Indian immigrant connection, to the UK, and then on to the world. In the UK, ska was also known as
`blue beat' music. Rocksteady, and later, reggae sprang from the loins of ska in the late 1960s.
Mid-1970s and 1980s/1990s revivals of this popular dance form have kept this music alive and fun
through the present. The ska beat on drums and bass, rhythm guitar, lots of horns and maybe a
Hammond organ --- that's the ska sound."
There are also some articles about Ska, and the BossTones: