Am I at the back of an organ? What are these things?
Later: These are Lamson tubes and I took the photo at our newly renovated Myer department store. They were for transporting cash to and from the sales counter to the cashier. The cash was popped into a tube and whoosh, it was gone (kind of like what happens to my cash on payday). They operated on either compressed air or vacuum. I would guess that this was Myer's cashier's end of the system. Our local Coles supermarkets use a modern version of the same system and it is supplied by the company Lamson.
More reading here and here.