Every so often a customer will come in alone, book in hand, and proceed to hang out in a booth and catch up with their favorite characters. I really enjoy these customers, as they are super chill, easy to take care of, and generally good tippers.
In addition to keeping their drinks full, I make it a point to ask them what it is that they're reading. The answer usually includes the title of the book, followed by some small talk about the genre or other works they've read by that author.
I've always liked chatting with my bookworm customers, and was excited when a middle age fellow came in by himself, sat down in my section, and busted out a novel.
Me: Hi there! What are you reading today?
Customer: A book.
Me: ...Oh... *awkward silence*...uh, great! *huge forced smile* What can I get you to drink?
