A four-suite unit positionable in an aircraft cabin to one side of a longitudinal aisle and including first and second suites positioned longitudinally-aligned and facing each other, a shared passageway positioned between foot ends of the first and second suites, third and fourth suites positioned longitudinally-aligned and to one side of the respective first and second suites, a first passageway positioned between a portion of the first suite and a portion of the third suite for accessing the third suite from the shared passageway, and a second passageway positioned between a portion of the second suite and a portion of the fourth suite for accessing the fourth suite from the shared passageway.