Anthropologists have long been interested in rituals among certain cultures. Many rituals in a culture involve singing, chanting, drumming, dancing, or moving together. A recent study (see below for full reference) shows that when people take part in synchronous activities they then are more cooperative with each other when participating later in different activities.

https://www.blog.theteamw.com/2010/04/15/100-things-you-should-know-about-people-32-synchronous-activity-bonds-the-group/