My mad friend
 

I have never done it at work as such though my partner does house cleaning and has done some housesitting at her client's houses from time to time and we have done it at one place in their bed so I guess that sort of qualifies? My favourite story though is of a friend who worked as a security guard in Melbourne, Australia and back in the late 80s his wife did some cleaning at the same workplace which was one of the largest petroleum companies in the world. One night they did it on the CEO's desk and I always wonder if he suspected anything the next morning? He was also telling me that when he was at primary school a few of them saw two teachers doing it in one of the classrooms!

Thanks
 

All really great stories thanks all :)

I did once when working late, the spot we chose was the boardroom table - had a board meeting the next day and it was pretty cool sitting there replaying it in my mind while everyone droned on about budgets and forecasts.