I was walking up Broadway, about to get on the subway, when I spotted a strapless denim number in the window of Atrium. The dress, by Hudson, was dark blue with a banded waist and a lot of stretch. After wriggling into it, I was surprised that it actually held in problem areas instead of revealing them. The top was cut low and sexy, and the vertical seams created the illusion of being thin. The problem? As I tried to exit the dressing room to get a better look, I realized that the clingy cut and mid-calf hemline made it virtually impossible to walk. 644 Broadway, nr. Bleecker St.; 212-473-9200.