By LORETTA FULTON Back in the day, Mack Eplen’s Driveateria on North First Street was the place to be and be seen on Friday nights. Many an Abilene teen spent hours–and gas–circling Mack’s. Today that location is the home of the United Methodist Service Center & Food Pantry. On Saturday, Oct. 12, Terri Eplen-Kleen, a great-niece of Mack Eplen, will