Not many legends play concerts in Batavia, but this Thursday, Batavia Downs will host Jimmy Sturr -- winner of 18 Grammy Awards, leader of a polka band since age 11, and musical artist who has recorded 152 records. His first recording in 1964, in the midst of Beatlemania, was a 45 -- the A-side and a song Sturr wrote, "Hepsa Polka" -- and he's been touring and recording since,