[MRM]

Most states do not have social host liability for individuals who host private parties and do not charge. Laws obviously vary from state to state, and my thought here are meant to be general education and are not legal advice in any way, but generally liquor liability comes from statutes called dram shop statutes that impose liability for illegal sale of alcohol. Since private individuals who don't charge for entrance to their party are not selling alcohol, they are considered social hosts, not dram shops. Unless there is a specific statute imposing social host liability, the general rule is that there is no liability because social host liability was not recognized in common law.

There are exceptions to the exception. Some states have imposed social host liability for people who provide illegal alcohol, such as adults furnishing alcohol to underage minors. In that case it's the illegal act of providing alcohol to someone who can't have it that gives rise to liability. Generally, if someone provides their own and drinks it at your place, you'd have to do something very stupid in encouraging dangerous behavior to be liable for them getting drunk and causing damage to themselves or others.