Cocktail dresses evolved from parties held in the early 1900s as a way to enjoy a brief social hour or a pre-dinner mingle. Today cocktail parties still exist, but they can also be semi-formal affairs that go beyond cocktails to include dinner and dancing. Traditionally, women attending the cocktail party wore a cocktail dress, but today the cocktail dresses
have expanded to include a wide variety of styles. It can be as simple as tea length to as daring as a cut above the knee or as sophisticated as ankle length. What is known as the little black dress is famous for cocktail dresses, although these days cocktail dresses can vary in color as well.