The Girlfriend's Guide to Cocktail Attire: A semi formal dress code for evening events, weddings, and upscale gatherings. Think: dressy but not stuffy. Cocktail attire has fewer rules than Black Tie and White Women's Plus Size Cocktail & Party Dresses Nordstrom Plus Size Cocktail & Party Dresses Macy's Cocktail Dress vs Evening Gown: Understanding the Difference Women's A Line Formal Dresses & Evening Gowns Nordstrom