I'm going to have to say that _older_ people(seniors) are keeping libraries alive.
I've seen programs at libraries to help the Elderly learn basic computing skills, or have activities together(knitting clubs, boardgames, etc), to get them out of their homes/retirement communities and to a new place.
probably depends on the community. The library I usually visited were mostly kids and their parents. the librarians are probably the only older people. Another one, I did not notice many kids in the libraries.
I've seen programs at libraries to help the Elderly learn basic computing skills, or have activities together(knitting clubs, boardgames, etc), to get them out of their homes/retirement communities and to a new place.