Friends of the Mt. Diablo Peace and Justice Center tackle thorny issues on a regular basis, but they also know how to celebrate the holidays. The group invites all Rossmoor residents to “New Games for Older Adults” on Friday, Dec. 6, at 1 p.m. in the Club Room at Creekside. The gathering is designed to enrich existing connections and forge new ones. The fun and games will be led by John