In many states a social host—including the guest’s employer—who does not charge an adult guest—18 years or older in some states and 21 years or older in other states—for alcoholic drinks and who does not serve the beverages under the authority of a license or permit—is not liable for the guest’s actions or injuries to himself or others.

But in most states an adult social host is liable for personal injuries and property damage caused by a minor to whom the social host provides or furnishes alcoholic beverages—especially if the social host knew or should have known the minor would drive a motor vehicle under the influence or if the minor was obviously intoxicated when the social host provided or furnished alcoholic beverages.

Laws regarding social host liability vary from state to state and are usually located in a state’s statutes.

In Pennsylvania, social host liability is somewhat limited compared to other states. Under Pennsylvania law, a social host may be held liable for serving alcohol to a minor if the host knew or should have known the minor was under the legal drinking age of 21. If the minor subsequently causes injury or damage as a result of being served alcohol, the host can be held responsible. However, Pennsylvania does not generally impose liability on social hosts for the actions of their adult guests (those 21 or older) who become intoxicated. This means that if an adult guest, who was not charged for alcoholic drinks, causes injury or damage after consuming alcohol at a social event, the host typically would not be liable for those actions. It's important to note that these laws can be subject to change and may be interpreted differently by courts, so it is advisable to consult with an attorney for specific legal guidance.