Mary Kay’s annual US Leadership Conference has brought nearly 11,000 attendees—and $12.9 million in direct visitor spending—to New Orleans. The beauty brand and direct seller held its annual event at the New Orleans Ernest N. Morial Convention Center.  It marked the third time Mary Kay has held its annual Leadership Conference in New Orleans following events in 2005 and 2014.  To support Mary Kay’s commitment to preventing and ending domestic violence with its Don’t Look Away program, attende...