This story originally appeared in The Centre County Gazette. PORT MATILDA — A night of cheering for horses, friendly wagers, oversized derby hats and laughter will soon help write another chapter in a 20-year mission of supporting local cancer patients. The Bob Perks Fund's Night at the Races fundraiser returns Saturday, Oct. 3, from 6:30 to 10:30 p.m. at Good Shepherd Parish Hall in Port Matilda. Doors open at 5:30 p.m. The Kentucky Derby-theme…