Got a grumpy bunch at a meeting? Make them sing. Here is 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, people stood in a circle without sheet music (better for eye contact) and sang everything from tribal chants to pop songs. If the grumps balk, just start belting; it’s hard to resist a chorus of Journey’s “Don’t Stop Believing”.