UN-USEFUL exercises require to transform a real existent building, site, space, etc. into something astonishing, with lightness and poetry, in order to make people full of wonder [wonder-full]. It is important to work within the ‘Everyday scape’ and not to search for abstract configuration. No practical function has to be pursued! UN-USEFUL is just for the pleasure: it has to improve the quality perception of your everyday scape, moving you towards a different understanding of your context. "Open air rooms" proposes a transformation of our cities' streets into "open-air rooms": being at home even when outside.