A system has information processing devices and a server which controls information processing executed by the devices. One of the devices includes a querying part to transmit a query to the server whether the device is permitted to execute the information processing, a notifying part to notify the server of location information indicating a location of the device, and an executing part to execute the information processing in response to an instruction from the server. The server includes a receiving part to receive the query from the device, an identifying part to identify an area in which the device exists according to the information notified by the device which has transmitted the query, and an instructing part to instruct the device which has transmitted the query to execute the information processing based on how many other devices are executing the information processing in the area.