Cruise lines, it should be noted, are not bound by American labor laws, and workers are not paid overtime. Any limits on their workdays are set by the cruise line based on its own standards, and crew members generally work shifts longer than 8 hours and rarely, if ever, get a day off.

Related: Carnival Cruise Line shares new passport rules with passengers. During hurricane season, which ends Nov. 30, many ships have their itineraries moved around, and captains

Eating pizza after 2 a.m. is a tradition limited to New York City streets and cruise ships. Most cruise lines offer pizza until the wee hours of the morning. It's an easy way to keep passengers who may have overused their drink package in a good mood,

Most cruise lines offer pizza until the wee hours of the morning. It's an easy way to keep passengers who may have overused their drink package in a good mood. And it fits the "I'm on vacation" vibe,