Bureaucracy

Like the U.S.S.R, bureaucracy is governance by a group of leaders. Some call it government by committee. In any case, the advantage here is that you get decisions made by people who are invested in the organization, debate with each other about the best course of action, and act as a point of appeal if there's a problem in the space.

The disadvantage is that it can slow down the organization to unacceptible levels if the bureau takes too much power. Bureaucracies work best when they are accessible to the public (public mailing list), state the purpose for their organization, and handle things promptly.

They can be aided by the techniques under adhocracy, but may compete for power if bureau members feel the need to be needed (like funding sources).