I agree with Bonzo - a chair is something made, usually, of wood and/or metal upon which a person sits - it's an inanimate object. Calling the chairman/woman/lady - a human being - 'The Chair' is ridiculous - about as ridiculous as calling a dog a table.

If anyone referred to me as 'The Chair', I'd want to brain them with the nearest one, although I'd probably just ignore them until they started referring to me as a human being - The Chairman.

And I refer to women as 'ladies'. I may not be somebody who is anybody, but I was brought up by my father to behave with good manners, at least where ladies are concerned.