Blues song better known as "In the Evening, When the Sun Goes Down". [Note: if the song starts out "When the sun goes down (or in) (x3), hang my head...then it's this song Every Night When the Sun Goes Down ].
The first paragraph of lyrics goes as follows: In the evening, in the evening, mama When the sun goes down In the evening, baby When the sun goes down Well, ain't it lonesome Ain't it lonesome, babe When your lover's not around? When the sun goes down