If Miami-Dade County voters decide in January to allow slot machines at the county's parimutuels, the election could trigger the sale of venerable Miami Jai-Alai to a company that already owns casinos in Broward County and the Bahamas. The Isle of Capri, a St. Louis-based company with 18 casinos including four overseas sites, entered into an agreement in 2004 that gives the casino company first right to negotiate to purchase the Miami Jai-Alai property from owner Florida Gaming -- if the slots initiative passes.