What size event constitutes a group? A group is defined as an overnight gathering of people (typically 10 or more) that wishes to organize a private learning experience unrelated to public programs that may be offered. This can be an organization, corporate event, retreat, leadership training or social gathering where you wish to create your own schedule provided that a mission-aligned learning experience is part of your plan. All group events must be pre-paid in advance with 50% of the overall program costs funded when the contract is executed. What size event constitutes a group?