I have a 1970 Santa Fe timetable with a bus connection from Los Angeles to the SF Chief (NOT the then extinct Golden Gates). I know that in the late 60s SP did petition the PUC to drop the SJ Daylight between Bakersfield and LA after the PUC denied the petition to kill it entirely, and offered encouraged passengers the option of booking to Bakersfield via the Santa Fe bus, encouraging its use over the SJ Daylight to Bakersfield for passengers having the temerity to insist on riding an SP train at all.
The dining service on the Daylight was indeed a coffee shop, but it was not a coffee shop/lounge. The primary difference between coffee shop and a diner on the SP was that a "dining car" service used multiple plates, such as separate plates for sides, and had linen tableclothes. Coffee shop service was single plate service on placemats. I didn't think that difference was really worth noting much in the context of this discussion as today either would pretty much qualify as a diner. While there were coffee shop/lounges units such as the Pride of Texas coffee shop/lounges built for the Sunset, coffee shop service and coffee shop/lounge are not synonomous. SP did run 3/4 domes as lounge service on the Daylight in the summer in the late 60s in addition to the food service. I am not sure whether 1968 or 1969 was the last year they did that. I am pretty sure they didn't in 1970.
The Coast Daylight in the halcyon days ran triple-unit articulated diner/coffee shop cars with the kitchen in the middle unit serving both the dining room on one end unit and the coffee shop on the other. The Cascade and Lark had triple unit diner/lounges with the kitchen/dorm as one of the end units. In the evening the two diner/lounge units were set up primarily as a lounge with mostly lounge seating and tables towards the kitchen car set up for dinner service, while in the morning for breakfast service most of tables were set up for dining.
I am not sure what the Owl had off the top of my head, but it wasn't a feature train, and probably only had a coffee shop at most. The Starlight had a Tavern car and coffee shop, IIRC.
This is all very interesting!! What type of 1970 SF timetable do you have that shows the coordinated bus with the SF Chief? My understanding is that after 1966, Santa Fe only printed abbreviated, condensed timetables for its system, dropping (as did SP and a lot of other railroads) the beautiful full-colored timetables issued for decades and decades.
I have what I believe is the last full 1966 SF timetable, and it shows two buses daily between LA and Bakersfield, one coordinated with the once daily round-trip Golden Gate, and the other coordinated with the once-daily round-trip SP Valley Daylight!! In 1966!! There was no bus coordinated with the SF Chief either arriving or departing Bakersfield.
A July 15, 1968 Condensed SF system timetable that I have shows no bus connection with the SF Chief into or out of Bakersfield.
A June 1968 Official Guide of the Railways shows no bus coordination for the SF Chief between LA and Bakersfield in the Santa Fe timetables. In the SP timetables for the Central Valley, the SF Chief timetable for the Central Valley between Bakersfield and Richmond/San Francisco is listed but with no bus service between Bakersfield and LA.
A February 1970 Official Guide of the Railways has no coordinated bus service between Bakersfield and LA in the Santa Fe timetables section, and the SP timetables listing no longer show the SF Chief service in its Central Valley timetables.
The April 1971 Official Guide of the Railways, the last before Amtrak took over most of the passenger rail, has listings the same as in the February 1970 Guide.
So I'm wondering if the 1970 schedule you have was a short-term experiment that didn't last long? Given that the SF-bound SF Chief left Bakersfield at 3:30 a.m., I can't imagine very many people wanting to board at bus about midnight at LAUS for points north! Eastbound it departed Bakersfield about 10 p.m., meaning a bus connection would have gotten you into LA about 1 a.m. Even the pokey, long-way-around Valley Daylight would have offered better arrival and departure scenarios for passengers.
Strangely, between 1968 and 1971, the Santa Fe ran a through sleeper between LA and Chicago on the SF Chief between Chicago and Barstow, which was then switched to the non-streamlined Grand Canyon for the Barstow-LA portion (and by 1968, SF had dropped the Grand Canyon name though the train still ran on essentially its same schedule until Amtrak assumed control).
You're right that diner vs coffee shop is a distinction without a real difference in the salad days of SP service on the Coast Daylight, especially with the triple units. And you're right about the Starlight service, which remained open all night between LA and San Francisco. (Imagine sitting in the beautiful lounge about 3 a.m. on the horseshoe curve out of San Luis Obispo!)
Looking back at the consist listings in various guides and SP schedules, the Owl ran always ran with a hamburger-grill car after WW II. But the West Coast, the overnight train between Sacramento and LA, had a full diner until the late 1950s, when the service deteriorated to a snack-lounge car, and then the train disappeared after 1960.