Warm and fuzzy, but I have to ask how many people can honestly say they would pay a cover charge or monthly membership fee to be allowed to enter a bookstore. I suspect the number is quite low.
Another reply to you mentions the niche-in-a-big-market thought (which is fair enough), but for me something like Book Depository solves my 'problem' perfectly - painless, cheap, etc. I will read a book in the morning, lying in some ridiculous position on the couch, in airports; no part of me at those times wishes I was reading in some public space.