No one was expecting unanimity; if taste is individual, then discord among this cohort was inevitable. And yet we had asked each of them to nominate their 10 to 15 favorite rooms ahead of time, which the group would whittle to a list of 25. The overlaps were obvious front-runners: Four people chose the soaring, glass-walled sitting area of Pierre Chareau’s Maison de Verre, built in Paris in 1932, while Cy Twombly’s objet-filled 1960s living room in his Roman apartment, Rem Koolhaas’s elevator-cum-office built in 1998 for a disabled client in Bordeaux and Yves Saint Laurent’s art-covered 1970s Parisian salon were also submitted by several panelists. A lively conversation ensued for nearly three hours: What’s more important, the architecture or the design? Are the best spaces dictated by the people who inhabit them? The designers who create them? The period they reflect? Or some magical alchemy of all those things? Should public areas like hotels and restaurants be given as much weight as private, residential ones? And, actually, what is a room?