1. A processor-implemented method for tracking multiple people in a motion capture system, comprising the processor-implemented steps of: tracking at least one group which includes a first group, the first group comprises peoples' bodies in a field of view of the motion capture system, the tracking includes detecting the peoples' bodies in the field of view; based on the tracking, determining movement of the first group as a first unitary entity based on movement of the people in the first group; and providing inputs to an application which are based on the movement of the first group as the first unitary entity, the application displays a virtual space on a display, and updates the display based on the inputs.