During Liverpool Biennial 2004, Liverpool Hope University hosted a Big Draw event. People were invited to draw a credit-card size picture onto large sheets of paper on the walls of the Cornerstone gallery. They received over 900 pictures and the college will receive a runner-up award from the Drawing Inspiration Awards next month.
Update: Oops, no it wasn't at the cornerstone, they had another big draw event called 'Evolve'. The credit-card thing was somewhere on the main campus.