In all my visits to Chicago, I learned only one new thing from the Miesians, or actually two.
One, Mies had received a letter from Hugh Hefner once, asking him to do the Playboy Headquarters–Mies had said no, for reasons no longer accessible.
Two, Mies’ model shop had a (frequently exploited) view of the photo studios of Playboy Magazine–all during the Fifties and Sixties, Mies’ architecture and the first generation of playmates had been fabricated in voyeuristic proximity.
It is exactly that kind of proximity we proposed for the Campus Center and the Commons, and which the Miesians wanted to undo.
Rem Koolhaas, in "Miestakes"
http://aplust.net/permalink.php?atajo=miestakes