Something like this is easy to say, but it's really hard for outsiders to give advice about your family. From your simple description, it is not difficult to see that changing your mom is more difficult than changing your dad, try to find something that can be done at home for the elderly and like to give them something to do, so that your dad to change the habit of going to the square on the good. For example, playing mahjong, or learn from our Cantonese people drink night tea, is in the in the nightclub night snacks. In fact, both of these are ways to deepen communication, communication more will be better.