I reckon one day about 100 pilots should rock into the street in full uniform and just sit and have coffee for a few hours. Productivity would probably go up as everyone would have to return to their desks to work rather than hanging out in the street.
The one small method error in that hypothesis is the assumption that there is a productivity differential between the office and the cafe. It is highly probable that even if they were sent home their productivity would not be statistically different...