Restaurant mystery shopping and training efforts are even more important during the holidays, with busy employees facing the challenges of managing more customer traffic.   With holiday celebrations for family and offices soon to be in full swing at restaurants across the nation, and alcohol often a big part of these celebrations, we thought that the National Restaurant Association’s infographic on alcohol service was timely.   As restaurants revamp training for both new and seasoned employees on alcohol service compliance, it always helps to revisit the basics.