"where to get off" has at least three interpretations---the one you note, one in which you insulte the Parisienne (why a Parisienne? Why not the English word, which has the advantage of being gender-neutral, "Parisian"?), and the (presumably) intended interpretation, what exit to use.
"why a Parisienne? Why not the English word, which has the advantage of being gender-neutral, "Parisian"?" I believe I did use the term Parisian....
I could have used the even more offensive (joke) term "parisite".
