A star party is a social gathering of amateur astronomers revolving around observing the heavens and enjoying the company of people with a similar interest. Typically, these are held at remote locations, away from city lights, to get the best possible conditions.
Most astronomy clubs hold single night star parties on a regular basis.
These are usually within driving distance and are expected to be an evening observing with the club, with a drive back that night. Recently, regional star parties have become popular. These are typically several days or a week long and are at very remote locations. They are expected to involve a special trip to the location and a several night stay. They often have special events such as talks, side trips, and vendor booths.