Office equipment offers unique places in which to hide - nice and cozy and often warm. Even if you have just had your nails clipped, many wall coverings offer excellent opportunities for climbing one form of the corporate ladder. Some are made with interesting materials like peg board. Given the right angle, feel free to do some free-climbing up the apparently unscalable slick horizontal sides of book cases and cabinets. As ye can squish, so can ye inflate.
Book cases are also very nice.
Rapid lowering of your body temperature in the non-temperature controlled environment will ensure that you don't make any inadvertent moves that might give your location away. Remember to sneak around behind their backs. Ignore food and heat traps set for you. Be sure to explore the inside backs of closets, or see if there is anyway to scale to the uppermost shelves in a closet, then tuck yourself back out of sight. Name, rank and serial number only.