Add White House Black Market to the list of mass-market retailers that have jumped into the bridal gown business. Like J. Crew, Macy’s and Target, WHBM has apparently wised up to the fact that there are plenty of brides who can’t afford a $10,000 Vera Wang. The retailer has four wedding gowns on its website (www.whitehouseblackmarket.com), priced from $348 for a polyester satin gown to $698 for one made of silk taffeta. The prettiest—the $598 Victoria—is a strapless gown of ruffled tulle, with a pleated bodice, mermaid skirt and abbreviated train. Fittingly, it comes with a black ribbon sash. White Gown Black Sash—get it?