Ruby Princess is impressive featuring spacious interiors and a wide range of attractive public rooms and intimate places. It offers plenty of activities for adults and children alike and easily seems to absorb the large number of passengers carried. Ruby Princess passengers tend to be Mixed Ages and American and British depending on region and ship.. When all cabins have double occupancy, the ship provides a space ratio of 36.6 tons per passenger and a crew to passenger ratio of one for every 2.6 passengers. At full capacity the space ratio is 29.7 tons per passenger and the crew ratio is one to 3.2 passengers.