Greatest impromptu piano duet by a 90-year-old couple in the Mayo Clinic lobby you'll hear today

Greatest impromptu piano duet by a 90-year-old couple in the Mayo Clinic lobby you'll hear today.Mayo Clinic atrium piano, charming older couple... Fran & Marlo Cowan (married 62 years) playing impromptu recital together in the atrium of the Mayo Clinic. He turned 90 in February. The song is Old Grey Bonnet