I wonder if used bookstores should be thought of as that "third place" (not work or home) a significant percentage of the population like to hang out at, rather than just a retail shop. Would a used bookstore look different if it was designed as a club first, with a great used bookstore as its theme attraction? Borders was sort of going for that with their in-house coffee shops, but they were fairly sterile and mall-esque...not very clubby.