For more than three decades, Donald Davis played the six string, performing on an array of hits for the old Motown and Stax record labels. In fact, his guitar can be heard on Motown’s first hit single, “Money (That’s What I Want).†Some 50 years later, the 71-year-old Davis—now chairman and CEO of Detroit-based First Independence Bank (No. 15 on the be banks list with $161.1 million in assets)—has discovered a bold new beat. The three-time Grammy winner is banking on declining real estate values to be the bridge to greater profitability for his financial institution.