Some things to consider for any  function:

Main Liquors: Vodka, Rum, Blended Whiskey, Gin, Bourbon and Scotch. (Liter bottles are best used for easy pouring and less waste) You also may want to consider some optional items like Tequila, Triple Sec, Sambuca, Amaretto, Coffee Liquor, Brandy, Vermouth and maybe a little Med. Dry Sherry.

Wines: Soft wines make good party pleasers such as Merlot, Syrah or Red Zinfandel for your red wines. For your white wine, Chardonnay is a great party pleaser; they are usually crisp and dry. If you would like something a little softer, a good Sauvignon Blanc or Pinot Grigio would be a good choice. It's also a good idea to have a some White Zinfandel on hand for those who favor the fruiter wines.

Beers: You should have a variety of three to four beers and be sure one of them is a light beer. It's also a good idea to have some Non-Alcohol beer on hand.

Mixer's: Tonic Water, Soda Water, Ginger Ale, Seven Up, Coke & Diet Coke or Pepsi, Orange juice, Cranberry juice, Grapefruit juice, Pineapple juice.