The 45th Pulaski Polka Days is underway. "21 different bands at Polka Days this year. They play for about an hour set at a time. And they take a little break, and then they come right back on.

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 ...