Coen was appointed by the Mayor of Roswell to serve on the City of Roswell Recreation Commission beginning in 1977. He was a founding member of the Roswell Lions Club, a member and official of the Roswell Masonic Lodge, a founding member of a committee to develop a park and recreation. It serves the entire city of Roswell west of Georgia's State Route 400 and the city of Mountain Park, as well as small portions of Alpharetta and Milton.
