Keeping you guessing
Going away for a weekend or longer is meant to be exciting and fun. You can escape from the real world of work, bills, and chores, and focus on more interesting things. You could step out of your comfort zone.
Perhaps you could pretend to be some sort of codebreaker. That’s the only explanation for this ultra-confusing hotel room labeling system. The designer was obviously trying to inject a little more spycraft into everyone’s vacation. I’m a little worried there are still scores of hotel patrons wandering the corridors looking for room 402, though.