I ordered room service the other day, and the waiter that brought it up kept calling me "Sir." In Japanese, there is no gender difference for a courtesy title, like there is in English, with our tricksy "Sir" and "Ma'am." Everyone is just -san (e.g. Amos is Amos-san).
After butchering the Japanese language something fierce over the last few weeks, being called "Sir" made me oh so HAPPY.