Dangerous Mathematicians 394 Atlantic Ave, Brooklyn, NY11217 Dangerous Mathematicians is the atelier of clothing designer Karen Patwa, a former math teacher. Though the signage is…More not necessarily obvious, it's easy enough to spot; just look for the purple, pink and red facade. Come here for custom-made clothing for both women and men, including suits, dresses and wedding gowns. A selection of ready-made options are also available in the shop's boutique. Call or go online for more information and to schedule an appointment.