(WSPA)—A Greenville-based restaurant chain has been forced to pay over $618,000 in back wages to over 700 employees. The Department of Labor reported Tropical Grille Restaurant Group found record-keeping and overtime pay violations across 12 Upstate locations, including Anderson, Clemson, Easley, Greer, Lexington, Mauldin, Simpsonville, and Spartanburg, as…