Alternate manners of utilizing areas of, principally, cargo areas of commercial passenger aircraft are described. These manners of utilizing preferably occur during cruise or other non-TTL portions of flight and provide passengers with additional opportunities to move, shop, meet, relax, bathe, exercise, cook, eat, work, or otherwise engage in activities conventionally unavailable or difficult to perform while on-board commercial aircraft. They likewise may provide opportunities to generate additional revenue from passengers without necessarily adding seats. Equipment and structures permitting these uses of the cargo areas as lower deck cabins also are detailed.