Here is mine:

I served in Uruguay. Down the street from the offices there was a giant sign on a a temp agency building. The sign said, in English, "ManPower."

Right underneath the sign, every evening, transvestite prostitutes would gather to try and get clients. I am not sure if any of them spoke English enough to appreciate the humor. Once, my companion and I were approached by one as we walked by. I asked him/her if they paid the building owner for advertising. He didn't understand my question. We turned down his offer for a good time.