Small social group whose members share personal and enduring relationships. -People share many activities, spend a great deal of time together, and feel they know one another well. -Families are these types of groups in that they are the first groups we experience in life and because they are of central importance in socialization process.
Cocktail dress: Formal, usually knee-length, something more like an LBD Prom dress: VERY formal, usually floor-length, basically think ball gown, bedazzled. Evening gown: VERY formal, a lot like prom dress, less bedazzled That's what I think the difference is.
If you are invited to a drinks party with a Black Tie dress code between the hours of six and eight pm, then you should opt for Cocktail Attire, but ensure the length of the dress only creeps up to just above the knee, and stockings should be worn.