Carnival Cruise Line's policy falls somewhere in the middle and Brand Ambassador John Heald recently explained how his cruise line's passengers should handle their luggage once they board the ship. Sign up for the Come Cruise With Me newsletter to save money on your next (or your first) cruise.

As long as you settle any real money in private, or better yet, off the ship, Carnival has no recourse. The cruise line isn't looking to bust people for playing small-stakes games with their friends; it's literally just enforcing the rules.

That forced cruise lines to relax their dress codes on night one as sometimes passengers simply did not have their clothes to change into. Related: Carnival Cruise Line bans onboa

The cruise line absolutely forbids something some passengers like to do, and it has explained why certain menu changes were made.