A party is a gathering of people who have been invited by a host for the purposes of socializing, conversation, recreation, or as part of a festival or other commemoration of a special occasion. A party will typically feature food and beverages, and often music and dancing or other forms of entertainment.

At parties for children, time is often taken for the "gift opening" wherein the individual whose birthday is celebrated opens each of the gifts brought. It is also common at children's parties for the host to give parting gifts to the attendees in the form of "goodie bags". Children and even adults sometimes wear colorful cone-shaped party hats.Birthday parties are often larger and more extravagant if they celebrate someone who has reached what is regarded in the culture as a milestone age, such as transition from childhood to adulthood.

A spin-off of dance parties, the rave involves dancing to loud house music, techno music, or industrial music. Rave parties may be attended by as few as a score of people in a basement or, more likely, by a few hundred people in a club, to as many as thousands in a large warehouse, field, or even tens of thousands in a sporting arena, amusement park, or other large space.