Margate Hoy is a simple English dance that can be done quite zestily. "Hoy" is some kind of ship. I heard somewhere that Margate Hoy was a ferry boat named for the town of Margate, but I have not found "hoy" defined as a ferry boat anywhere online (yet). I did find this definition of Hoy from Dictionary.com:
noun, Nautical
1.
a heavy barge used in harbors.
2.
a vessel of the 17th and 18th centuries, usually slooprigged, used for fishing and coastal trading.
You can find different takes on the dance on youtube; in particular, one from a Civil War Ball and another from a Jane Austen convention:
www.youtube.com/watch?v=cPD2LYYc1bAwww.youtube.com/watch?v=VRWwLX2qvGg (it doesn't start right away)
Then we have eight children (it's usually a dance for three couples) in a video you can download (or perhaps just play) from the Constant Billy Trust schools resource pack: