It’s called a night of fashion, sweetie—look it up. The W Hotel will be hosting the Pose Fashion Show this Saturday, complete with pre-runway mixer and after-party. The event, which will spotlight the work of some of Boston’s best urban designers, will kick off with a little networking before the show begins. Dancing and music (Top 40 and hip hop in one room, and international music in another) will follow. Snag tickets ahead of time and note that upscale attire is mandatory… because fashion.