It's a mystery why the Shops at West End is still struggling to fill its St. Louis Park lifestyle center when several of the businesses there are already expanding. The latest is Hot Mama, which plans to add space behind the current store. Founder/CEO Megan Tamte says she has been pleasantly surprised by the traffic at West End and the store needs more room to keep up. Hot Mama joins Cooper, which is adding square footage to its dining room, Rojo, which took over its own pizza spot to add a party room, and Crave, which opened a second concept, Sopranos, at West End. Meanwhile, there hasn't been an announcement of a retail opening to fill one of the many lingering vacancies since White House/Black Market, which opened in May.