While the ship is docked in San Pedro still embarking passengers, a couple hits the jackpot on a slot machine set up in the Purser's Lobby. But casino-style gambling, including slot machines, is illegal in California outside of tribal casinos run on tribal lands. Gambling on cruise ships is not allowed until the ship is in international waters. That slot machine should not have been operational (or, indeed, even set up there) while the ship was in port.
Near the end of the episode when Captain Stubing tells Frank and Florence he's decided not to prosecute Frank, the epaulet on Captain Stubing's right shoulder is on backwards.