Franks Café and Campari Bar has been built on the top of a multi-storey car park in Peckham, south London, for the last two summers. It offers penthouse panoramas of London from a structure built of scaffolding boards, and of the kind of canvas you more usually see on the side of trucks. It has been hugely successful and fashionable, to the extent that its designers, Practice Architecture, are worried that they have become unwitting gentrifiers of the neighbourhood

Photograph: PR