A method (500, 700) for a control device (126, 128, 300) configured for controlling a media playback system, the media playback system comprising a plurality of playback zones each comprising at least one respective playback device (102, 104,106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 200), the method comprising: in response to a single user input to a graphical user interface (600, 800, 1000) comprising an indication of a first zone, the graphical user interface displayed on the control device, the single user input indicating a command to cause the first zone to form a zone group with at least one second zone and to play back target media in synchrony with the at least one second zone, the second zone to be determined by the control device from among a plurality of additional zones; determining the at least one second zone from among a plurality of potential zones that are playing back media, based on at least one of: a detected signal strength corresponding to each of the plurality of potential zones; and a most recent user interaction time of each of the plurality of potential zones, the user interaction time representing a time when any playback device within the zone last received user input or provided playback of media, or a time when the playback queue of the zone was last updated; and causing the first zone to form the zone group with the second zone and to play back the target media in synchrony, wherein the target media is media being played back by one of the first and second zones, before the first zone is caused to form the zone group with the second zone. in response to a single user input to a graphical user interface (600, 800, 1000) comprising an indication of a first zone, the graphical user interface displayed on the control device, the single user input indicating a command to cause the first zone to form a zone group with at least one second zone and to play back target media in synchrony with the at least one second zone, the second zone to be determined by the control device from among a plurality of additional zones; determining the at least one second zone from among a plurality of potential zones that are playing back media, based on at least one of: a detected signal strength corresponding to each of the plurality of potential zones; and a most recent user interaction time of each of the plurality of potential zones, the user interaction time representing a time when any playback device within the zone last received user input or provided playback of media, or a time when the playback queue of the zone was last updated; and a detected signal strength corresponding to each of the plurality of potential zones; and a most recent user interaction time of each of the plurality of potential zones, the user interaction time representing a time when any playback device within the zone last received user input or provided playback of media, or a time when the playback queue of the zone was last updated; and causing the first zone to form the zone group with the second zone and to play back the target media in synchrony, wherein the target media is media being played back by one of the first and second zones, before the first zone is caused to form the zone group with the second zone.