An apparatus for automatic client device location detection includes a controller module configured to receive first network traffic transmitted on a computer network of a hospitality establishment from a known location within the hospitality establishment. The controller module is further configured to query one or more network components of the computer network to determine a source access-node from which the first network traffic originated, and store a mapping of the source access-node to the known location in the storage device. The controller module is further configured to receive second network traffic transmitted on the computer network by a client device at the hospitality establishment, query the one or more network components of the computer network to determine that the second network traffic originated from the source access-node, and automatically determine the client device to be at the known location according to the mapping in the storage device.