Political parties have governing bodies, caucuses have governing bodies, clubs have governing bodies, when you agree with your roommates to split your rent 3 ways, that is a form of government. Government is separate from the state. The state is not necessary for forms of government to exist. Understanding the difference is vital to understanding how a stateless society would work.
This is a series that I plan to flesh out over the next few weeks and months. If you'd like to read more on this give me some up votes. The more I get the faster these will come out.