PHOTOGRAPHY: O'NEAL COMPTON (TOP); TOSHI YOSHIMI (MIDDLE AND BELOW); RENDERING COURTESY FELDERMAN KEATINGE & ASSOCIATES; LOUIS REENS (OPPOSITE) In 1996, Felderman and Keatinge (top right) designed an office for MTV Networks in Santa Monica (middle right). The forward-thinking space established a precedent for creative offices and included "living rooms"-areas that encourage interaction-such as one with an Airstream trailer (below). 57 contract