Last year's varied-across-the-hotel temperatures were due to the hotel being poorly designed. The front door "airlock" does not function well with high traffic, and leads directly into the huge open area, so even a slight wind outside results in huge very-cold drafts moving at random through the concourse. Also there was poor pressure and air flow management in the hallways behind the rooms on the art show side of the hotel, so large amounts of freezing cold outside air came in through those service hallways.

These problems CAN be solved, but I haven't heard about anyone addressing them this year :(