I spotted this luxurious massage room in an Upper East Side townhouse designed by New York interior designer Jennifer Post (whose home we toured this week), and couldn't quite believe my eyes. I've seen a few homes with foldout massage tables and several with a massage table set up in another room like a gym or a bedroom . . . but a dedicated room for the rubdown? That's living the good life.It got me thinking about other extravagancies some people have in their homes. From in-home theaters to indoor basketball courts, people with money have gotten very creative when it comes to what qualifies as a residential "room." Which of these extravagant rooms would you most prefer to have?