My students are too respectful of us to do that.
Years ago, one of my students lived around the corner from me, and her kid was the same age as my son. They went to pre-school together, played together shared the same day-care provider. Once, when I was dropping my son off at pre-school, she was also their and I told her "look, over here, off campus, we're neighbors and fellow parents. You can call me [my first name].
She still couldn't do it and it was always "Dr Goro", when we met off campus.
It's like calling your parents by their first names.