In the Bay Area at least, libraries are where people without computers go to access the Internet. The Internet is the easiest way to perform a lot of basic life tasks, like interacting with the government. People without computers these days are generally lower income, so it's true that there are more poor people in the library.

In some areas, it is definitely significant that libraries have bathrooms and shelter. But the Internet is always a big draw. With more and more of life moving online, libraries are providing an extremely valuable service by making Internet access freely available.