When you’re new somewhere, the first person to explain the unwritten rules is doing you a huge favor.

Every place runs on rules nobody has written down. Which door is actually unlocked, who you do not sit next to, how early you have to arrive to get a locker that closes, what the manager cares about and what they ignore. New people break those rules by accident and pay for it socially, which is why the person who quietly explains them is saving you weeks.

Say thank you properly, not just in passing. Write down what you learn so you can pass it on later. And when the next new person arrives, be the one who explains the unwritten part before they trip over it.