At the Library Hotel in Manhattan the rooms are organized according to the Dewey Decimal System and housed within its guest rooms and lobby are over 6000 volumes.
Here's how the Library Hotel describes its concept in a press kit:
"Each of the 10 guestroom floors of the Library is dedicated to one of the ten major categories of the Dewey Decimal System including: Social Sciences, Literature, Languages, History, Math & Science, General Knowledge, Technology, Philosophy, The Arts and Religion. Each of the 60 exquisitely appointed guestrooms have been individually adorned with a collection of art and books relevant to one distinctive topic within the category of floor it belongs to."Found at The Washington Post Full article at the link.