theideabook.org – excerpt:
One of the cafes in an international European airport was often full… people sat nursing their coffees for a long time as they waited for their planes to depart… How can we encourage our customers to vacate the tables more quickly? …they finally
decided … to turn off the flight monitors in the cafe! This
made people worry about missing their flights, which led to them looking
for monitors that worked, thus leaving empty tables. When the cafe had
enough empty tables, the flight monitors suddenly started working again
to attract new customers.