<Ul> <Li> At "Studniówka", a kind of prom in Poland, the first dance is usually a polonaise, which students usually have to practice before the ball . </Li> </Ul> <Li> At "Studniówka", a kind of prom in Poland, the first dance is usually a polonaise, which students usually have to practice before the ball . </Li> <P> Since these times the phrase "to open the ball" has become a figure of speech for initiating an activity which will be subsequently continued by others . The term has been used in descriptions of battle scenes . </P>

Where does the first dance tradition come from