"A Room for the Night" joke

A Jewish lady named Mrs. Rosenberg who many years ago was
stranded late one night at a fashionable resort on Cape Cod --one
that did not admit Jews.
The desk clerk looked down at his book and said, "Sorry, no room.
The hotel is full." The Jewish lady said, "But your sign says
that you have vacancies." The desk clerk stammered and then said
curtly, "You know that we do not admit Jews. Now if you will try
the other side of town..."
Mrs. Rosenberg stiffened noticeably and said, "I'll have you know
I converted to your religion."
The desk clerk said, "Oh, yeah, let me give you a little test.
How was Jesus born?"
Mrs. Rosenberg replied, "He was born to a virgin named Mary in a
little town called Bethlehem."
"Very good," replied the hotel clerk. "Tell me more."
Mrs. Rosenberg replied, "He was born in a manger."
"That's right," said the hotel clerk. "And why was he born in a
manger?"
Mrs. Rosenberg said loudly, "Because a jerk like you in the hotel
wouldn't give a Jewish lady a room for the night!"