For questions about issues that take place at a party, or at a party-based setting. If the question is about a general social event, and the party itself has no relevance to the question, then use the "social-event" tag instead.
Parties are a form of social-event, typically in a set location where people celebrate a certain event of achievement. Questions with this tag involve situations which happen exclusively at parties, and where the event being particularly a party is of importance to the question.
Tags such as friends and united-kingdom should also be used with this question.
If the question is about a general social event, and the party itself has no relevance to the question, then this tag should not be used, instead use the social-event.