Kimberly and Michael Shambora of Laflin, at left, are enthusiastic about dancing the polka. John and Jean Gallas of Lancaster brought their twins, 17-month-old Andrew and Elizabeth, to see a bit ...

The 19th-century European immigrants to Wisconsin arrived with polkas ringing in their ears. The polka, a lively couples dance in 2/4 time, had developed from folk roots and became a European ...