"Susan" or "Mrs. Jones": How Should Kids Address Adults? http://www.ivillage.com/etiquette-advice-ho

HAving living in both the North and the south, it depends on the situation and who the people are.  Our very close friends were known as Aunt and Uncle to our kids.  In scouting we were Miss Sue and Mr. Dave.  In school or situations where we didn't know the kids well, it was Mrs. Weber.   But we never let our kids call adults by their first name.....it just didn't seem proper to us!