People like that talk at you, rather than have a conversation.
A natural reaction is to avoid them, but that doesn't solve the problem! I read somewhere that a way to stop them is to interrupt them politely but use their name as in "Rita, I think ... " and keep doing that.
It reminded me of a woman that has popped up in various singing groups in our area, she doesn't sing, she bellows, complete with avcompanying hand gestures, and no one wants to sit next to her. I'm amazed she doesn't get the message. She will often say something like "I trained in theatre so I project my voice". She's a bit Florence Foster Jenkins ...