The long-awaited Saks Off 5th store opened its doors this week at Rockville’s Congressional Plaza, joining Last Call Studio by Neiman Marcus as the upscale shopping center targets label-conscious bargain hunters. Grand opening festivities are happening this Saturday (Oct. 22nd) from 11 a.m. to 3 p.m. with music, wine, snacks and swag bags for the first 200 shoppers. On-trend footwear — especially over-the-knee boots — will be a centerpiece of the store this fall, says Off 5th spokesman Meghan Biango.