So, I work in the archive. and we use a lot of social media. We have an online clock in system (standard for the university), an online patron-tallying system (that we rarely remember to use), the facebook pages for both the archive and the building, and iirc my boss Heather also keeps a blog of fun stuff we find.
This past week, we started a pumpkin decorating contest (within the building) and are using social media not only to promote the voting for it, but the voting itself is online.
My entry has ended up on about 6 pages so far, and it’s shocking to me how quick it spread.
Social networking makes things seem “fun”–and even the library is a)proving that and b)benefitting from it.