West Hollywood Patch had the articles:
Considering how stuffed and crowded Line 4 is at night, I think this is worth exploring. I'm imagining a double-decker bus with house Music and go-go dancers.
However, if I were designing an evening party shuttle, I'd do something a little different than just a circle around West Hollywood.
I'd see about partnering with the City of Los Angeles and connect to the Red Line at the Hollywood & Vine Station. Hollywood & Vine is the historical center of Hollywood and an evening Party Bus that runs there could connect with Theatre Row and the emerging nightclubs east of West Hollywood on Santa Monica Blvd.
Here is one map with a circulating bus that would run clockwise and counter-clockwise:
Here is the route I prefer.
It shuttles people back and forth from the Hollywood & Vine station and passes through Theatre Row, goes through the east side of West Hollywood, then up Holloway to the night clubs on the Sunset Strip and then down San Vicente deep into the heart of "boystown" down to LaCienega/Wilshire. (Note: I also think this would make a marvelous streetcar route and northern alignment extension of the Crenshaw/LAX Line.)