Let me preface this by saying that patrons have to walk up the stairs to get to the circ desk in the first place.
Bossy Patron Who Has Been Slowly Driving Me Crazy All Morning: Do you have a public restroom?
Perky Me: Yup! It's right downstairs next to the water fountain.
BPWHBSDMCAM: Where are the stairs?
PM: (silently, AUUUUGH!) Right behind you, sir!