The keeper of every hotel shall post in a conspicuous place in the office or public room and in every bedroom of the hotel a printed copy of §§ 486K-1 to 486K-8 and a statement of charge or rate of charges by the day for lodging. No charge or sum shall be collected or received by any keeper for any service not actually rendered, or for any item not actually delivered or contracted for, or for any greater or other sum than the keeper is entitled to by the general rules and regulations of the hotel. For any intentional violation of this or any provision herein contained, the offender shall forfeit to the injured party three times the amount of the sum charged in excess of what the offender is entitled to.