Been too busy to read the Boneyard the last few days, but here's a thought on the wet floor.
HVAC people have told me (when we were replacing our units) that if you install a unit too large for normal conditions and/or run the system on too high a fan setting you reduce the units' capacity to remove moisture from the air.
For example, if the unit is too large it will cool down the building so fast the system won't run long enough on very humid days to remove the excess moisture in the air. Also, if you run the units on too high a fan setting to try to cool down the building faster, you'll reduce the temperature but not remove the desired amount of moisture from the air.
They gave compelling reasons to install units with variable speed fans rather than multi-speed fans because they allow more fine tuning of air flow, dehumidification, etc.
So, this COULD have been the scenario at Gampel:
-Energy efficiency software is set to minimize use of the HVAC system during times when the facility is not in use;
-Staff didn't pay attention to the weather conditions and/or change system settings early enough on game night;
-Day of game is warmer and more humid than expected so staff ran the units at higher speed OR the units are of older design and capability and don't have the ability to vary fan speed;
-Result was the building was cooled down enough to be comfortable for the fans but the air retained too much moisture and the excess moisture condensed on the coolest surfaces in the building (like the floor which is always cooler than the walls and ceiling).
Not sure I'm right but it seems plausible.