My family does and my friends find it odd. It's not like we just get together for a drink or two, No, we really go all out. Jello Shots, mixed drinks, DJ, a keg at times, dance offs, fireworks, etc etc etc
Everyone who is willing to have a good time is invited, we even invite neighbors, although they often choose not to come.
Reasons we might have a party is 1.Birthday 2. Memorials 3.New Years or 4th of July 4.When any one gets accepted to a college
So do you party with your family?