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.
The dress code considered formal in the evening is white tie. In the UK, morning dress is standard formal day time clothing (a lounge suit being still considered informal dress), but in the US/Canada morning dress is rare, having been replaced with the stroller and then the lounge, or business suit.