Inspired by the popular 21 Balançoires (21 Swings) installation, The Swings: An Exercise in Musical Cooperation is a standalone musical installation available for international touring.Since 2011, the original 21 Swings installation has attracted millions of fans to the Quartier des spectacles area in Montréal, where every day each swing has swung an average of 8,500 times. This is a study and compartive analysis of the impact the project had on three cities.