"The approach is most distinctive for its initial lack of an agenda, which sets the stage for the meeting's participants to create the agenda for themselves, in the first 30-90 minutes of the meeting or event. Typically, an "open space" meeting will begin with short introductions by the sponsor (the official or acknowledged leader of the group) and usually a single facilitator."
"Drawing on seven integrated design principles, the World Café methodology is a simple, effective, and flexible format for hosting large group dialogue. "