If you are planning to have a party where to serve alcohol, make sure that alcohol is consumed responsibly.
Don't forget the ice. You will need plenty of ice if you serve alcohol drinks.
Alcohol affects the human brain. Under its influence a person may not be rational. So don't encourage excessive drinking.
You must offer your guests non-alcoholic drinks too: mineral water, juice, water.
Stop serving alcohol before the party is about to end. The human body is able to eliminate about one drink per hour.
In order to prevent drunk driving make sure your guests have transportation options. As a host you are responsible for the safety of your guests!