1.   Another client came to Passoff when her bedroom floor became a solid field of laundry baskets stuffed with cosmetics.

2.   As they head out on another fast break, the open floor becomes a kangaroo court.

3.   But the flight attendants, aware that the floor was becoming hot and soft, started moving passengers out of that part of the cabin.

4.   But the fourth floor eventually became the place where you could still be surprised.

5.   Dance floors became smaller as real estate prices rose during the postwar building boom, so swing dancers learned to move within a narrow rectangle.

6.   Fine wood floors became a central part of a new design ethic that valued authenticity and natural fibers above all else.

7.   Inside, the elevators move at an ancient pace, and the scuffed linoleum floors become dirty just moments after being mopped.

8.   Oak floors became ash floors, complex paint effects gave way to a simple whitewash and exposed timbers.

9.   Or the floor could even become a school within a school.

10.   Some traders and market makers complain the floor has become increasingly crowded, and some question how much renovation and renewal the building can withstand.