I get a lot of use out of my Mullet Dresses. They're business up front, party in the back - day-to night dressing for dummies. Just cover up the 'party' when the sun's still up. I either throw a blazer over or a slim jersey tee under. So easy.
left: Sheri Bodell Evermore Harness Dress $304
right: Alice + Olivia Grody Dress $242
both @ Shopbop