Rachel Cothran on her A-game. K Street Kate: Project Beltway’s Rachel Cothran Wins “Washington’s Top Artista” Title DC’s stylish set competed on the canvas at a special ArtJamz painting event at Bloomingdales to benefit Becky’s Fund Thursday night. Holly Thomas(Washington Post), Kate Michael (K Street Kate), Elaine Mensah (FashionBS), Rachel …