If I'm in a meeting and the person chairing it is a woman, I'm perfectly fine with Chairwoman. Likewise, Chairman if it's a bloke. I'm fine with Chairperson or just Chair in either case. But if we're just talking about meetings in general, we may need something generic. In that circumstance I'm fine with Chair or Chairperson. Shouldn't be saying Chairman if I don't know the gender of the person in the chair or if I know it's a woman. It isn't hard, is it?