My father slipped on the floor getting out of the hot tub in a room and tore his rotor cup and since had surgery on it.

The law doesn't necessarily protect the company.  I'm not sure from the information you provided what you are asking.  If the amount the insurance company is asking about is medical bills, then give them the medical bills.  If they are asking about a settlement amount, then you should probably consult a lawyer to make sure you are asking for the right amount to include pain and suffering, possible loss of employment or ability to work, future earnings, etc.  If you were staying in a hotel, and the hotel is a national chain that has hotels located in New Jersey, you can bring an action in New Jersey.  Good luck.