New initiative at Rockville Town Square: filling some of those empty storefronts with pop-up shops. At 36 Maryland Ave., once home to LiquidBlue Denim Boutique, four female entrepreneurs will be on site through Memorial Day selling chocolates, lotions, fragrances, dog treats, scarves, purses and jewelry. Just a block away on Gibbs Street, pop-up bookstore Carpe Librum is at the Square through August raising funds for child literacy efforts. More on that in our April 11th edition.