What exactly do you mean???

4 portable banquet style coffee urns out full of coffee nowhere near a brewing station or any other device to brew coffee...

Woman:  Oh, is there coffee in these?
Me:          Yes, there is !
Woman:  Which of these are working?

Me:        Ummmm, they're all working, ma'am.  

Woman:  They're ALL working?

Me:        Uhhh, yes, ma'am. The freshest are the two on the right.

Woman: Which one? (Points to the second from the left.) This one is working?

Me:       Working? I'm not sure what you mean. They all are working, but the freshest are the two on the right.

Woman: (Puts her hand on the 3rd from the left) This one is working?

Me:       Yes, they are all working, but that one and the one on its right are the freshest.

Woman: This one? (puts her hand on the one on the right end)

Me:        Yes.

Woman:  These are the ones working, right? (Points to the second and third ones.)
(I give up)

Me:        Yes.

Woman:  (Moves her hand onto the third one from the left and starts to dispense herself some coffee) This one, right?
Me:         Yes, that is the one that is working.