Business Baton Rouge riverboat casino earnings for July down 11% from June By Eric L. Taylor - August 23, 2022 iStock.com/Matjaz Boncina FacebookXLinkedinEmailPrint The Capital Region’s three riverboat casinos earned about $20.05 million in July, a decline of 11% from June, the Louisiana Gaming Control Board’s latest report shows. L’Auberge, the largest ea… Already an INSIDER? Sign in.