I have never heard an attorney referred to as Dr., including law school professors, unless they had a LLD or PHD. The practice of not calling attorney's Doctor I believe came about because, until fairly recently, in the U.S. a law school degree was a LLB, bachelor of legal letters. LLM, master of legal letters and LLD, doctor of legal letters are still advanced degrees that some law schools offer over and above a JD.
It just always seemed a bit incongruous that a Juris Doctor law degree, which requires at least three years postgraduate work, is not entitled to the same respect/recognition as other doctor degrees including some that appear to require less in the way of rigor and or requirements.
OK, let fly with the lawyer jokes, at least if there are any "fresh" ones.
We had a lawyer in our town who was always called “Squire B____.” (B is the first initial of his name.)