Case in point, Balboa South on Chula Vista’s Third Avenue. “I’ve probably been coming to Balboa South for probably about 4 years now,” Angie Diaz said. Mariana Cardenas, the owner of Balboa South, is who’s kept people coming back. Katia Callahan helped organize a fundraiser at Balboa South Wednesday night for Cardenas. A flyer from organizers said it’s to help Cardenas, who they said is facing serious health challenges, and the proceeds will be for her medical expenses.