A pre-wedding party is an event that is held before the wedding ceremony. It is usually hosted by the bride and groom's families and is a way to celebrate the upcoming nuptials. The term 'STAG' is used to refer to a pre-wedding party for the groom and his male friends and family members. This type of event is often held at a bar or restaurant and is a chance for the groom to have one last night out with his friends before the big day.