If you had a party and served frozen foods, beer in cans, wine out of a box, no music at all, and kept the light on, the party would not be too great at all. The rules for good entertaining are; Good food, good drinks, and good atmosphere.
Casual parties should even serve fresh, good food. Finger foods are the best because there are no utensils that are needed so there would be less of a clean up afterwards. Serve the food on trays this way there will be enough so you will not need to run back and fourth from the kitchen. You too need to have enjoyment from the party.
Never ever serve canned beer. Wine should be bought in bottles. It should not cost you an arm and a leg even though it doesn’t come from a box. It is also o good idea to have a few bottles around the house, for guest that may pop by and like to have a few drinks.
As for atmosphere it had three components music, lighting, and decoration. There needs to be music at every party. Where there is good music there usually is dancing, and parties are a lot better if there is dancing. You will see nobody dancing with the light on. A dimmer switch should be considered if you plan on having more then one party a year.
The table with the finger foods and the liquor will probably be the focal point so pretty it up with some flowers and a table cloth. If it is a theme party then decorate accordingly. Nothing tacky is needed.