The Palais de Tokyo contemporary art center in Paris differs from traditional "white cube" art spaces by leaving its interior unfinished and emphasizing experimentation over clean presentation. This reflects the curators' view of the space as a "laboratory" for interactive, work-in-progress art. However, such project-based art risks becoming merely an "experience" catering to entertainment. The trend of inviting artists to design museum amenities also enhances the curator's status over artistic works. Nicolas Bourriaud's theory of "relational aesthetics" aims to define 1990s art focusing on human interaction, but such work risks being merely pleasing rather than politically or critically engaged.