Black Sequin Cocktail Dress Floor Length A Line Semi Formal Evening Dress for Women A Line Cocktail Dresses Elegant Dress Kentucky Derby Semi Formal Tea L JiMiss Dresses Garden party, semi formal, cocktail dresses encouraged" : r Weddingattireapproval 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