Dick’s Warehouse Sale, the off-price offshoot of Dick’s Sporting Goods, just opened its doors on Rockville Pike. Housed in the former Saks Off 5th space at Congressional Plaza, this is a no-frills operation with bare walls and unfinished ceilings. But if you’re looking for bargains, you’ll find them here: Racks and racks of clothes, shoes and workout gear, all the major brands, all at clearance prices. Grand opening festivities, with discounts and gift cards, will be happening all weekend long.