Once favored strictly by the hip-hop set, denim brand Parasuco has crossed all the way over to Ryan Seacrest. And now the Canadian brand has its first American store, a two-floor, 10,000-square-foot space in the old East River Savings Bank (60 Spring St., at Lafayette St.; 212-925-8858). The Greco-Roman design with soaring ceilings features men’s and women’s denim-and-leather pants, vintage grays, and the popular house label Cult tees and blazers.