Sgt. Pepper's Lonely Hearts Club is a euphenism that refers to the club that is referred to by the Beatles album Sgt. Pepper's Lonely Hearts Club Band. It's all the lonely people the band referred to in an earlier song, it's the alienated people. The Beatles are portraying to be the "spokesperson" band for that club. The album is a concept album that deals with the subject of alienation. That would be explored in more extensive detail in the double album The Wall by the band Pink Floyd.
After Steve, Ben and Greg swindled me out of $60 (I thought they were my friends) and Sara Ann left me for Joe I have become a member of the Sgt. Pepper's Lonely Hearts Club. There's no one in this building I can hang around with this weekend.
by I Saw U2 Live Twice June 02, 2007