* Enschede, Netherlands – 2002
* Boston, Massachusetts (USA) – 2003
* Lancaster (UK) – 2004
* Chicago, Illinois (USA) – 2005
* Bonn (Germany) – 2006
* Vancouver (Canada) – 2007
* Brussels (Belgium) – 2008
* Charlottesville, Virginia (USA) – 2009
* Rennes and Saint-Malo (France) – 2010
* Porto de Galinhas, Brazil – 2011
* Potsdam, Germany – 2012
* Fukuoka, Japan – 2013
* Lugano, Switzerland – 2014
* Fort Collins, Colorado, USA – 2015
