The melody for What Wondrous Love is This? (full title) can be traced back to the 17th century England, but text and melody were first published in the 1840 edition of Southern Harmony, a book of shape-note hymns.
[Give Me That] Old Time Religion dates from 1873, included in a list of Jubille songs. Charles David Tillman wrote down the melody when he attended a camp meeting in South Carolina in 1889. Arranged for horn quartet, this will have your audience swinging and singing along.
(Skill level: High school and above)