An example method includes detecting, via a control interface of a first playback device while at least one second playback device is playing media, an input indicating a command for the first playback device to (i) form a zone with the second playback device and (ii) play back the media in synchrony, and based on the detected input, causing the first playback device to carry out the command. A second example method includes detecting, by a control device while at least one first playback device is playing media, an input indicating a command for a second playback device to (i) form a zone with the first playback device and (ii) play back the media in synchrony, wherein the control device is configured to transmit commands to the second playback device; and based on the detected input, causing the second playback device to carry out the command.