When I visit libraries and other places I like to see what I can find out about their online presence when I am onsite. These are just a few examples.
Denver Library made it easy to find out about their local music
their ebooks and other online services as well.
Arapahoe Libraries had promotions including for ebooks, and zineo posters and screen savers
Robbins Library tells about the Massachusetts wide ebooks collection
Boston tells people about their renovations
Central Park encourages people to share their playground images
The Blood bank encourages sharing on social media
and the Australian Museum provided a hashtag (as well as other information not shown in this photograph)