Buzzfeed recently posted 12 Cuddly Bookstore Kitties - like Amber at Flights of Fancy in New York:
Adorable! Although I know the list isn't complete. There's Kona at Bound to Be Read Books here in East Atlanta. And Wild Rumpus in Minneapolis not only has a kitty - but also some chinchillas, a few chickens, a turtle, several rats, a tarantula (brrrrr), a ferret, several rats and a possum!
Thanks to Shelf Awareness for the heads up!