2008: Lyon FR - Invitation from ENTPE France to participate in an international conference on themes related to new forms of collective living projects in Europe. Presentation with Lidewij Tummers Tussen-Ruimte on the social dimension of cooperatives and the Poortgebouw in Rotterdam as a case-study.

2008: Rotterdam NL - "how is art, and cultural production more broadly, at once driving capitalist valorisation in the
city and able to project forms of social relations that do not produce value for capital?" Hosting and participation in workshops with international specialists. Panel discussion in NL Architecture Institute. In collaboration with Marina Vishmidt, Jan van Eyck Academy and Poortgebouw.

2007: Rome IT / Brussels BE - Presentation in the workshop "Inhabitants" in Rome around issues of how inhabitants can participate in market-driven city development in Europe and China. Workshop outcome presented in plenary sessions in Brussels. Invitation from International Alliance of Inhabitants and FPH.

2007: Berlin-Kreuzberg DE - Participation in the closing discussion round of "Kampf auf dem Parkdeck" July 22. An abandoned parking house in Zentrum Kreuzberg was appropriated by artist group Pony Pedro as a business site for the locals. Issues of entrepreneurship, gentrification, artists as social workers and survival in general. Moderation: Judith Albrecht

2007: Rome IT - Invitation from the International Alliance of Inhabitants to speak about self-organisation in housing projects in the context of the conference "Self-Recovery and Self-Building: Forms and Policies of a new Public Service for Social Housing". Organized by the Italian Ministry of Social Solidarity in the Campodoglio, Rome, April 5 2007.

2006: Vienna AT - W H Y was invited to participate in "Mündig und Hörig", an October discussion during the 25th birthday of WUK in Vienna around the themes of autonomy and self-organisation. A questionairre also collected the opinions, experiences and strategies of various individuals and groups in Holland (and abroad) where the issue of autonomy plays an integral role.

2005: Vienna AT - In the one month manifestation and exhibition in July 2005 in the Kunsthalle Exnergasse, freibesetzt explored in depth diverse concepts and strategies of "appropriation" through the presentation of physical spaces (free or occupied...?) in the Netherlands and Austria and the stories of their protagonists.
W H Y organized a series of public debates between Dutch and Austrian participants.

2003: Rotterdam NL - Rotterdam is going to hell. What can we do about it? The first episode (uraufführung) of CIVIC TV was a one day event that presented various approaches to understand, use & criticise the urban environment and how these practices are sustained. CIVIC TV was a unique opportunity for those interested in alternative mental and spatial engineering to meet.

2002-03: Rotterdam NL - Improvisation is the keyword. In this series of evening programs the attic of the Poortgebouw, improvisation doesn’t only refer to the oft associated jazz derive rather the desire to create an unpredictable evening without a pre-defined program shaped by labels (goth-night, hiphop-night, movie-night) and codified expectations.

1999: Salzburg AT - In collaboration with Techno-Z Design School, an 8 month mediatecture studio was lead to explore the bridges and gaps between the language of architects and new media designers.