There’s something thrilling about being in a library after hours. From Harry Potter’s Restricted Section to Beauty and the Beast’s sunlit personal collection, there’s a special joy that comes with being all alone and surrounded by books, and even a seasoned librarian like me isn’t immune to that little frisson of excitement. But when most people imagine the library after dark, they don’t typically picture a crowd whooping as a drum solo crescendos or a singer hits the perfect...