Device discovery for social playback

A media playback device comprising:

• at least one processor;
• at least one memory device storing instructions which, when executed by the at least one processor cause the media playback device to:
• log the media playback device into a first user account of a media delivery service;
• initiate a social playback session;
• broadcast a message for the social playback session to permit a second media playback device being logged into a second user account of the media delivery service to automatically join the social playback session when the second media playback device is in proximity to the media playback device and the first user account is linked with the second user account;
• and
• receive one or more playback control commands from the second media playback device.

A method of joining to a social playback, the method comprising:

• detecting, at a second media playback device, a message for a social playback session, the message being broadcasted from a first media playback device, wherein the first media playback device is logged into a first user account and the second media playback device is logged into a second user account;
• automatically joining the social playback session based on the second media playback device being in proximity to the first media playback device and the first user account being linked with the second user account;
• and
• sending one or more playback control commands to the first media playback device.