Chicago-based fast-casual and virtual chain Wow Bao has teamed with Automated Retail Technologies to roll out high-tech vending machines designed for nontraditional venues such as hospitals, airports and hotels. The first 50 machines, which prepare refrigerated bao and dumplings to order, were installed in cities in Georgia and Florida last week, and the chain plans to put them in cities throughout the US and Canada in the coming years. Restaurant Business