It seems that cabin crew quarters above extend down into the bin space. (seatguru.com)
Facilities include crew quarters, exercise and work stations, a kitchen, a social gathering area, and the capsule for the reentry of Earth's atmosphere at the end of the mission. (discovermagazine.com)
With a truck - size cargo bay, robotic arm, and — by Apollo standards — palatial crew quarters, the shuttle would be able to carry large satellites for release into orbit, haul up and piece together space - station components, and provide a temporary orbital home for scientists and engineers. (discovermagazine.com)