One of my first business trips was to King of Prussia, PA for a training class. I had gone back to my room for the evening and ordered room service. Went to put the tray outside my door and it slams shut behind me. I was now locked out in my Spongebob pants So I sucked it up and went down to the lobby to get a new key. Of course a whole bunch of people had to be checking in then, forcing me to stand around and wait. When I got home and told my parents, they said "Why didn't you just use the courtesy phone?" Now I know to look for phones on the wall in the hallway.