Remove all of your chairs, except those at the gaming table. This encourages mingling, the essence of the party. Of course, you'll want to make exceptions if you need to accommodate the elderly or disabled. Set up a bar if you don't have one, and hire or appoint a bartender. Use top shelf brands.
Wine is acceptable.
If you must serve beer, make sure it is a premium or microbrew. Don't forget your guests that abstain. Bottled water and a few non-alcoholic cocktail choices will do nicely. Bring in extra end tables, the higher the better. Confine the party to one room.