PLAINS TWP. — There’s a good reason why William C. Kurilla dances the polka. It keeps the 77-year-old retiree young. “I feel 39,” said Kurilla, of Walnutport, between numbers by the John Stevens’ ...

Now we come to the most familiar form of O’odham music — waila. The word means both this genre of music and “polka.” Modern waila is almost exclusively instrumental dance music, and is usually played ...