You know the old fire (or combustion) triangle? The concept that for something to burn, it requires a spark, fuel and oxygen? I think for a successful charge station installation, you have a similar set of requirements. You need good hardware, a good management policy, and a good group of drivers.
The Site and Hardware
Once a week, I charge at a certain public station. The site is a parking lot which is surrounded by many tech company offices, and the number of plug-ins in the lot probably exceeds the average by quite a bit.