The post my memory was jogged to make. Not much of an MD connection to hang your hat on, so to speak, but fits with the Hollywood history angle of the thread.
Real Life Files: The Ambassador Hotel and Cocoanut GroveMuch of this information is sourced from:
http://www.hollywoodusa.co.uk/ambassador-hotel.htmand
http://theambassadorhotel.com/The Ambassador Hotel and its attached nightclub Cocoanut Grove were beacons in the Hollywood social scene throughout the 20s, 30s, 40s, 50s and 60s. There is a great history of Hollywood folklore contained within its walls. In the late 20s/early 30s Cocoanut Grove was known as "The Playground of the Stars". It hosted literally thousands of dance competitions (maybe some Jitterbugs along the way) and it is said that Joan Crawford won over 100 dance competitions following her arrival in Hollywood in 1925 (eat yer heart out Diane).
Judy Garland's comeback was made at The Ambassador after several years of illness with a series of extravagant concerts. Several Academy Award Ceremonies were held in The Ambassador, and it was the place in which the Oscar statuette was introduced. The jury of the Charles Manson trial stayed there for its 9 month duration.
But The Ambassador's most infamous moment came with the assassination of Bobby Kennedy in 1968 when he was shot in the hotel's kitchen after delivering his Californian Primary victory delivery speech.
On the Sunset Boulvard tip, apparently Gloria Swanson was a long term resident in the hotel at one point.
The stories are endless if you dig around a bit...
Over the years it seems the hotel and its nightclub deteriorated into a state of disrepair and was closed in 1989. Since 1989 it has functioned often as a filmset (details below). It is currently owned by the Los Angeles Unified School District, and the city announced plans in September 2004 to raze most of the 500 room hotel to house an elementary school, junior high and high school - some 4,200 students on the 23-acre property. It is proposed that the Cocoanut Grove remains as the proposed school's auditorium. Other options include converting the main body of the hotel into the a school, rather than knocking it down. I guess if they can keep such an apparently culturally rich site in this way rather than destroying it, there'll be something to be happy about.
[Edit: I wrote most of this quite a few years ago on another board, and the hotel was indeed demolished in 2005 and the land used to build the Robert F. Kennedy Community Schools]By naming Ann Miller's character Coco Lenoix, Lynch weaves a subliminal connection between Miller's own life, that of her character and the Havenhurst location, the history of the Grove and The Ambassador, together with the classic "Golden Age" of Hollywood with all its archeypes, legends and myths.
We have a slightly altered spelling of the word "coconut" here though, with an "a" added to make it "Cocoanut". Possibly Lynch observes the A by calling her Lenoix (emphasis on the Le), as opposed to simply Noix. It's not a strict translation, I know, but it's a neat little connection.
Some pics from the site:
There are a series of bungalows on the site, looking more than a little like Sierra Bonita:

Looking like a dilapidated Park Hotel:

Here's our Cocoanut Grove entrance:

And here's the Cocoanut Grove theatre - a possible influence for Silencio?


There's more if you surf the sites I mentioned above, and the links that are provided on them.
As for the films with scenes shot in and around the hotel over the last few years, here's a list.
From
http://www.hollywoodusa.co.uk/ambassador-hotel.htm:
The Ambassador Hotel had been used in many movies before its closure, perhaps the most memorable being The Graduate . In which The Ambassadors Lobby, Reception Desk & Palm Bar are all shown extensively when a young Dustin Hoffman conducts his love affair with Mrs.Robinson (Ann Bancroft) in the hotel, called The Taft in the film. Since its closure The Ambassador has been used exclusively for location shooting in Movies, TV series, commercials & video's. The dark wooden veneer walls, high ceilings & general 30's decor make it a firm favorite with film companies, especially with no public to contend with. Some film shootings which have taken place at the Ambassador include scenes from :-
The Fabulous Baker Boys - True Romance - The Mask - Rocky - The Wedding Singer - A Star is Born - Naked Gun -
Hoffa - The Lawnmower Man - Murder She Wrote - Beverly Hills 902120 -Man on the Moon -Crazy in Alabama.
Pretty Woman - The scene when Vivian (Julia Roberts) is taught the use of place settings was filmed in the ballroom.
L.A. Story - The Ambassador's Entrance & Foyer are used as the L'Idiot Restaurant.
Forest Gump - Used as the strip club in which Forest's girlfriend Jenny performs & sings in the nude.
Apollo 13 - Used as the apartments used by Gary Sinise and Kevin Bacon in the film.
Mafia-The Movie - The Lobby was turned into a Las Vegas casino and the Lido pool was the empty pool that the girl dived into.
Deep Impact - The scene where Morgan Freeman is in a Hotel kitchen area was filmed at the Ambassador.
The Rat Pack (1998) - The outside of the hotel was used when Sammy Davis Jnr. was protested at by whites.
The Cocoanut Grove can also be scene extensively in the 1933 Films 'Lady Killer' staring James Cagney, and the Jean Harlow film 'Bombshell', in which the resident Gus Arnheims orchestra can be clearly seen.
I must admit I was disappointed not to find a Lynch film in there - that would have been nice.
As it is - a few loose connections and some interesting information.
Sorry if this felt a bit like a history lesson, but this whole thing really captured my imagination.
We have a Cocoanut, I guess we have to find an Ambassador in MD now. ;)