Each of the rooms that you build can be equipped with TVs, and other useful facilities. I suggest that you go ahead and buy one of each for each room that you have, because they will increase the amount of money your customers will give you when checking in there. Another thing which you should do once you have enough money is start upgrading these items in the rooms. That will increase the comfort and stars of the hotel, so try to do it when you have gathered enough money.