The crowded library +
For them, a seat is not very necessary, they may just seat on the floor and bury their eyes into papers. I love reading, but I have to admit that I seldom come to library for reading books.
I usually belong to the first group. However, if I'm free from work and study, I do enjoy reading a book like a real reader in a library. I read e-books as well, but the recent book I started reading on an app appears to be a paid book. I find this optional, because I could easily borrow that book from the public library. I really think library is the best infrastructure to mankind, though sometimes it could be frustrating, because you are not come to the library as early as others did, so you end up not finding an available seat.