A black-tie dress code is pretty self-explanatory, but cocktail attire? That's where things start to get a bit tricky. Not quite formal but no where near casual, the best way to describe the dress ...

In the simplest of terms, it's a semi-formal style of dress typically worn on early evening and late afternoon occasions. "Cocktail attire was first popularized in the 1920s as women in the U.S. moved ...