This week Neiman-Marcus said it will close 10 of its 37 Last Call stores, which feature discounted merchandise from previous seasons as well as pieces designed specifically for the off-price market. The Potomac Mills and Arundel Mills stores are both on the closing list, but the Rockville store at Congressional Plaza is not. In other Congressional Plaza news: Smoothie King is now under construction near the center’s new outdoor seating area, with plans to open as early as next month.