Adult reading
My most fun course was Personal Reading for Professional Development. It was a grad course and the only assignment was to make a list of title and author of every book the student had ever read. I had no way of verifying that a student’s list was complete. Many experienced teachers read a large number of books as students, to keep up with the subjects they teach and for fun and out of curiosity.
My all-older male reading group consists of retired academics and professionals only. We have had a practice of alternating a common book each month, with a fiction choice alternating with non-fiction. Non-fiction possibilities dominate with fiction choices being difficult to even get suggested, much less chosen.
Many readers are reluctant to re-read a book they have read, even though they often don’t remember much of the book. But it can be very pleasant to even just hear the title of a book they read way back when.