If one was going to run into a fellow Ravenclaw, odds were good that the bookstore would be the place to do so - if it wasn't the library. The bookstore tended to be a little more social though since it was a mix of browsing and shopping.
"I love the smell of new books... knowing that I am the first person to have it - not having to worry about cracked spines and dog-eared pages... Plus as great as the library is, its a lot harder to get newly released books... and I don't know about you, but my tastes can be a little obscure sometimes."