How does the informal organization help individual members of a formal organization and the organization itself?

In formal organizations, informal organizations arise. Women will get together for lunch. The women will chat. Men will get together after work for beer. The men will swap stories.

In the formal organization when two women from different departments must work together, if there are two women from the lunch group in each department, they will feel at ease with each other. They will easily communicate with each other. They will not get confused as they communicate.

Likewise. The men who drank beer together will be at ease will communicating with each other.

When communication within an organization moves much more smoothly, the organization prospers.