galley responsible for serving all major restaurants aboard the ship, though specialty restaurants may have their own separate galleys. As with any vessel, adequate provisioning is crucial, especially on a cruise ship serving several thousand meals at each seating. For example, a quasi "military operation" is required to load and unload 3,600 passengers and eight tons of food at the beginning and end of each cruise, for the . Other on-board facilities Modern cruise ships typically have aboard some or all of the following facilities: Buffet restaurant Card room Casino — Only open when the ship is at sea to avoid conflict with local laws Child care facilities Cinema Clubs Fitness center Hot tub Indoor and/or outdoor swimming pool with water slides Infirmary and morgue Karaoke Library Lounges Observation lounge Ping pong tables Pool tables Shops — Only open when the ship is at sea to avoid merchandising licensing and local taxes Spa Teen Lounges Theatre with Broadway-style shows Some ships have bowling alleys, ice skating rinks, rock climbing walls, sky-diving simulators, miniature golf courses, video arcades, ziplines, surfing simulators, water slides, basketball courts, tennis courts, chain restaurants, ropes obstacle courses, and even roller coasters. Crew Crew are usually hired on three to eleven month contracts which may then be renewed as mutually agreed, depending on service ratings from passengers as well as the cyclical nature of the cruise line operator. Most staff work 77-hour work weeks for 10 months continuously followed by two months of vacation. There are no paid vacations or pensions for service, non-management crew, depending on the level of the position and the type of the contract. Non-service and management crew members get paid vacation, medical, retirement options, and can participate in the company's group insurance plan. The direct salary is low by North American standards, though restaurant staff have considerable earning potential from passenger tips. Crew members do not have any expenses while on board, because food and accommodation, medical care, and transportation for most employees, are included. Oyogoa states that "Crewing agencies often exploit the desperation of potential employees." Living arrangements vary by cruise line, but mostly by shipboard position. In general two employees share a cabin with a shower, commode and a desk with a television set, while senior officers are assigned single cabins. There is a set of facilities for the crew separate from that for passengers, such as mess rooms and