Office Etiquette Guideline #99: Never, under any circumstances, play dominos at work. It may start off as all fun and games, and you might even get creative with different-coloured box files, but inevitably, the heat of competition will turn violent. The above photograph (Exhibit A) is CCTV footage of the shock on a murderer’s face when she emerged from her rage-induced psychotic killing spree to find that she had brutally butchered all of her co-workers. All over a game of dominos. The only work-friendly game that can be played in work time is Solitaire.