The presenters all handle social media for their libraries, but in very different settings: a large academic library at a public-private research institution, a medium-sized academic library at a private university, and a medium-sized public library in a town that revolves around a university. The workshop will provide some general discussion about how the different technology environments elicit different responses from various user groups and, using Twitter as a microcosm, the similarities and differences between approaches will be discussed. The legalities concerning social media policies and the magic of paying attention to target audiences will also be explored.