Using HDM an operator/manager can:

HDM allows the operator/manager to offer online payment options, track player credits or balances owing, and enforce late cancellation policy. HDM captures valuable information which saves the operator/manager time. Imagine running a drop in game where all available playing spots were filled in less than ten minutes, three days prior to the event. Imagine having goalie attendance at over 99%. And, imagine making some extra money doing it.