Seconds (1966) is about a senior citizen (still employed though) who was getting tired of his life and wanted a change. He began getting phone calls in the middle of the night but they turned out to be from his college friend who felt the same way, wanting a new life in a new place.
The college friend referred him to the "Company" where an enormous transformation takes place.
This movie is worth watching - maybe more than once. It is filmed in real places - like Scarsdale, NY, Grand Central Station, NYC and a beautiful beach house in California.
You'll also like the "party" several parties actually. It's so way out but that's what makes it so good. I recommend this.