Urban Conga is a non-profit organization that's on a mission to enhance community-building through a combination of social and physical activity, such as though this fun public furniture piece that is both interactive, practical and musical.
Although the piano-inspired bench looks deceptively simple, hitting a note on the bench does so much more than just emit a pleasing sound. The bench is meant to be played during the day and night, using lights and sounds to interact with other surroundings nearby. For instance, interacting with the bench causes LED lights on nearby street lamps and buildings to "dance." To be considerate, at night the sounds emitted are much softer.
Urban Conga is currently in the running as a finalist eligible to receive the Playable City award.