Forgetful staff. In the morning before I went to have a day tour to Phi phi, I gave my room key (which was still a real key, not card) to the reception staff. But when I came back in the evening, the other staff in the current shift couldn't find my key. And it turned out that the morning staff misplaced the key, and didn't tell the other where he put it. And it took me more than 10 minutes until they escort me to my room with the spare key.