DUS Architecten and Studio for Unsolicited Architecture built a dome of umbrellas around a lamp post in Amsterdam and held a party under it:
The Bucky Bar was first in the series to be realized, made from the most common and yet most unusual of building materials: umbrellas. The title refers to the great American inventor, Buckminster Fuller, who demonstrated how minimal energy geodesic domes could open a way to a more environmentally sustainable future. Could an umbrella dome to lead the way to a more socially sustainable future? The Bucky Bar is a full-scale model of such a future. It shows the power of space for spontaneous gathering, for improvised shelters to host conversations, debates, games or even parties.
Similar in unsolicited spirit to Pop Up Lunch.