Ships often offer great on-board diversions to those who remain on board.
    a. Easier Access to Amenities: pools, spa services, dining, fun venues, gym, particularly on high-end cruises.
    b. Slower Paced: Crew can engage more; tailored services
    c. Special Activities: engine room tours, cooking classes, workshops; high-tech demos, wine tastings, gourmet cooking demos.
    d. Dining Experience: more intimate, private, w/ unique dishes, leisurely.
    e. Ship Photography: minimal people.