'Summer Rain' Lyrics Always Bugged Me

The Johnny Rivers' song, 'Summer Rain' contains a line that always bugs me when I hear it. The line is:
'And the jukebox kept on playin' Sgt. Peppers Lonely Hearts Club Band'.

Here's the deal. Sgt. Pepper didn't have any singles, and jukeboxes only played singles. So the lyric doesn't make any sense.

There is another verse where he sings: 'Everybody kept on playin' Sgt. Peppers Lonely Hearts Club Band'. Okay. That makes sense. But no jukebox, in 1967, played Sgt. Pepper.

Glad I finally got that off my chest after 40 years.