Housing Works is taking advantage of the city’s lowering rents, opening its eighth location in well-heeled Tribeca this week. The intimate (700 square feet) space will offer the usual rotating selection of furniture, like a Le Corbusier chair ($1,100), or the floral settee here ($395), plus designer clothing. On March 7, items donated by neighborhood locals like Susan Sarandon and Brooke Shields will be in the location’s best-of-spring preview sale (72 Warren St., nr. W. Broadway; no phone yet).