What Organizational Methods Do LUGs Use?

spacey-g asks: "What methods are used by Linux User Groups (especially those in the US) to organize their group? Is it president/vice president/etc., anarchy, amorphous, monarical, three branches of government? What types of rules are typically laid down during meetings: Robert's Rules of Order, WWF rules of disorder, etc?. With the Linux community growing every day, I feel it is important to understand how local groups are handling the task of managment and interaction with other groups." Any LUG officers: please feel free to share what methods have and have not worked for your groups.