In order to search Chateau Nuit, you must spend energy. The actions are Search Seats ( 2), Ask Around ( 4), and check bathrooms ( 6).
After searching, Maria will talk to you.
Maria: We've searched every inch of Chateau Nuit and all we've found are a bunch of paper scraps with phone numbers and pre-chewed gum! If Kim lost her mother's gift, it wasn't here..."