Observing the data

With the addition of having the door tell the internet when it's open or closed, it allowed me to feed that data into a spreadsheet on Google Sheets. We didn't tell people that data was being harvest since it's completely anonymous and would throw off any normal readings on usage. Since the digital sign was put up before the tracking, we can't compare the usage from before to the new solutions. We can however observe and calculate the average amount of time spent in the bathroom; about 5 hours per day this bathroom has someone in it. This brought up a thought about "wasted" time at a billable agency; although little can be done to stop employees from using a bathroom. What other rooms are wasteful yet could be optimized?