A system for monitoring a queue including an entry sensor subsystem for sensing the entrance of customers into the queue, an exit sensor subsystem for sensing the exit of customers from the queue, and a processing system in communication with the entry and exit sensor subsystems. The processing system is operable to log a customer sensed by the entry sensor as entering the queue, determine from the exit sensor subsystem if the logged customer has exited the queue within a predetermined time period, and if the logged customer has exited the queue within the predetermined time period, log the customer as having received service or, if the logged customer has not exited the queue within the predetermined time period, provide an indication to management personnel.