Working in a corporate vacum (literally!)

One of the strangest requests I had recently was to run some trainings for a company who worked in the information sector, who required sales input. The first thing I noticed on signing in at reception is that the signing in book asked for "visiters" rather than "visitors" to sign in! This same lack of attention to detail was also a thread throughout their other business strategies.
During the first day I couldn't figure out what it was about the office that seemed odd, until when I asked to open a window, it was pointed out that there were NO windows. In short the whole office suite only had a very bad air conditioning system and unsurprisingly most staff felt very odd and complained of having headaches!