Here’s a weird but proven team builder for your group: Sing! Research reveals that group singing is a great way to build bonds. The magic is in the common goal, physical exertion, and synchronous effort. In a recent study in Royal Society Open Science, peo- ple stood in a circle without sheet music (better for eye contact) and sang everything from tribal chants to Disco songs. If the grumps balk, just start belting; it’s hard to resist a chorus of “Come To Me” by France Joli.