The album consisted mainly of older pop tunes, making this release notable in its lack of the duo's normal rock and roll. Allmusic stated in its review: "...much of the playing was impeccable, but also, apart from three exceptions, incredibly boring, something the Everlys had never been before. Instant Party! marked a low point in their artistic fortunes..."

Side one

1. "Step It Up and Go" (Traditional; credited to Don Everly, Phil Everly under the pseudonym Jimmy Howard) - 1:58
2. "Theme From Carnival (Love Makes the World Go 'Round)" (Bob Merrill) - 2:40
3. "Jezebel" (Wayne Shanklin) - 2:20
4. "True Love" (Cole Porter) - 1:59
5. "Bye Bye Blackbird" (Mort Dixon, Ray Henderson) - 3:15
6. "When It's Night-Time in Italy It's Wednesday Over Here" (Lew Brown, James Kendis) - 2:00

Side two

7. "Oh! My Pa-Pa (O Mein Papa)" (Paul Burkhard, Geoffrey Parsons, John Turner) - 2:08
8. "Trouble in Mind" (Richard M. Jones) - 2:30
9. "Autumn Leaves" (Joseph Kosma, Johnny Mercer, Jacques Prévert) - 2:50
10. "Long Lost John" (Adapted by Ike Everly) - 1:49
11. "The Party's Over" (Betty Comden, Adolph Green, Jules Styne) - 2:14
12. "Ground Hawg" (Adapted by Ike Everly) - 2:02

• Don Everly – guitar, vocals
• Phil Everly – guitar, vocals
• Chet Atkins – electric guitar
• Hank Garland – electric guitar
• Luther Brandon – acoustic guitar
• Floyd Chance – bass
• Floyd Cramer – piano
• Buddy Harman, Jr. – drums

Technical

• Ken Whitmore - cover photography

• Collector's Choice Music reissue liner notes by Richie Unterberger.