I believe I have discovered the last surviving "Hang in There, Baby!" poster.
Do you remember these things? They used to be all over the place in the 1970s. This one, you can tell by the faded colors, has been hanging in there all these years. I sort of remember what this poster meant when it was so popular, but it has by now acquired many layers of meaning. I can't tell whether it's richly ironic or sadly pathetic or whether it got back to being sweet again or whether it's gone on to being annoying the way it was in the 70s. Is it still up for no other reason than that it hasn't been taken down? It is behind a file cabinet (on what has long been an unused door between two offices). Or is the professor in the office trying to tell us something? And, if he is, what are the chances that it's "Hang in There, Baby!"?
Googling around, I found this old Ask Metafilter thread asking where to get the old poster, and that notes that "RetroCrush celebrates it." Do click on the RetroCrush link. You'll enjoy it. For one reason or another. I'm pretty sure.
(But it makes me think that the poster I've photographed here is an imposter. A second-rate follow on kitty cat, something like Jane Mansfield to Marilyn Monroe!)