Interestingly, I telephoned the Hyatt about a week ago to ask about their policy regarding use of the chargers. The person I spoke with told me the chargers were only for use of guests staying at the hotel. She even put me on hold for a moment to check with her manager; when she returned to the phone she confirmed that their policy is the chargers are for use of hotel guests only. Perhaps by "hotel guests" she meant those staying overnight or those using the restaurant, but she did not make that clear and I did not think to ask.
I am planning a trip to Charlottesville in April. I've figured out my charging plan so won't need the use of the chargers at the Hyatt, but I thought I would share this information with others. I included a comment on Plug Share to share this information.