(FORTUNE Magazine) – It's the school of rock for grownups! At FORTUNE's battle of the corporate bands held Oct. 18 at the Rock and Roll Hall of Fame in Cleveland, bands from Oklahoma to Minnesota to California showed their metal, er, mettle. Consultants, software geeks, and health-care execs, plus folks from the likes of Autodesk and American Express, battled for the top spot. The winner? The Residuals, a band of R&B bankers from Fleet Capital Leasing out of Providence. Congratulations, guys! Lease on! --Andy Serwer