POSTERS OF THE WEEK! (Week of _____)
This one is also self-explanatory, but you could add a headline like – NEED BUSINESS ADVICE? And a short description since the writing is small and will require your reader to expand it. So give the reader a reason to look closer.
You could post a brochure or a business card. This one could be opened up.
You could simply write your message on a whiteboard.
Of course the abacus is not for sale! I use it daily to teach kids in China online. (It’s true!) But you get the idea!
Happy posting! Christiane