In the book, is the tourism is driven primarily by the inherent novelty and wonder of being on the moon, seeing Earth, experiencing the weaker gravity, etc., or is the draw primarily based on facilities that have been built there, like casinos, resorts, amusement parks, etc.?

My guess is that you would need to have a lot of the latter, because while the former would be undoubtedly cool, I’m afraid the novelty would wear off quickly if the living and entertainment facilities themselves were anything less than spectacular.