“The nonprofit library cooperative that owns the Dewey Decimal system has filed suit against a library-themed luxury hotel in Manhattan for trademark infringement. The Library Hotel, which overlooks the New York Public Library, is divided according to the classification system, with each floor dedicated to one of Dewey’s 10 categories. Room 700.003 includes books on the performing arts, for example, while room 800.001 has a collection of erotic literature.”