Abstract: The invention generally relates to systems and methods for coordinating participation in, and payment for, events. In particular, the invention allows a person to initiate a group event without exposing themselves to a full cost of the event, even where full payment is traditionally collected through a single bill or prior to the event. In some aspects, the invention provides a method of organizing an event that includes broadcasting information about an event to potential participants, receiving a commitment to pay from participants, and charging each participant their share while paying a full event cost, so that no one person must pay the full cost.