Derby days are coming - do you need a new hat? Join Park Louisville for a hat exchange party from 4-6 p.m. on Tuesday, August 11. Bring your gently-used hats to exchange at this Derby-themed mixer with cocktails and hors d'oeuvres. Suggested donation of $10 at the door. Proceeds go to the Alzheimer's Association. RSVP to 502-423-8776.