Don't let guests pour their own, especially after they've been drinking. If you serve an alcoholic punch, make it with a non-carbonated base so it won't be absorbed in the body as fast as wit ha carbonated base. Be sensitive to the fact that many guests accept more drinks because they don't want to be rude to their host. Watch for signs of intoxication And cut off the alcohol at least an hour before the party is over. With no exceptions.
Many people enjoy tonic or soda water with a twist of lime or lemon.
Here are some other good ideas for non-alcoholic drinks and for appetizers that help slow down the absorption of alcohol into the body.