Coworkers get a shared mystery to solve, not an evening that turns into a disguised performance review. This guide helps you choose a suitable work event, cast 8 to 20 suspects across familiar groups, arrange the room for in-person mingling, and protect quieter ways to participate. It also explains the boundary between a social activity and formal training, how the organizer can play without spoilers, and when a paid, ticketed, or fundraising event needs a Commercial License.