In my opinion Vodka after dinner is the best way to make party more delightful.

Depends on your age, if your young coke and chips would be the answer but when you get older alcohol is a natural stress reliever but always measure the alcohol you drink because too much and you could make the party less delightfull. Specific food should be served with wine like cheese but i dont know the specifics for other types of alcohol
Never drink if you are below indicated age.