A non-transitory computer-readable storage medium stores instructions for execution by a first client device, including instructions for transmitting an indication of availability of a first media presentation system and for transmitting to a second device a first authentication token for allowing the second device to access the first media presentation system, in response to a request from the second client device. The instructions also include instructions for requesting access to a second media presentation system that a third client device has indicated as being available and for sending to a server system a media control request directed to the second media presentation system. The media control request includes a second authentication token received from the third client device to allow the first client device to access the second media presentation system.