A persistent theme in 20th-century restaurants, found mainly in names and signs – and thankfully now over – was the coach and four theme. Obviously it is only one of a host of old-time symbols that restaurants have borrowed over the past 100 years. Others include spinning wheels, grist mills, and, oddly enough, brothels, all suggestive of simpler times when things were made by hand and gender roles were clear cut. The names and signs also acted as practical signifiers indicating to prospective patrons that they could expect standard American food to dominate the menu.
Both World War I and World War II stimulated this theme, possibly because Americans were looking for comfort and reassurance. Tea rooms of the First World War era were among the first and the worst offenders when it came to invoking a stable and secure pseudo-past. (When they were in New England, you think, Well, they have a right. Yeah, maybe.) An even stronger wave of nostalgia washed through the nation’s restaurants after the Second World War, replacing the brash modernism of the 1930s with colonial motifs for coffee shops and cafeterias. Never mind that the actual mode of transportation was bringing smog and sprawl to cities nor that convenience food had overtaken restaurant kitchens whose cooks could no more have cooked from scratch at a fireplace than their patrons could have hitched a buggy.
[Left] One of James Beard‘s favorite restaurants was Greenwich Village’s Coach House. It differed from most of its namesakes in having innovative cuisine. [Right] Another Coach House, in Atlanta.
It's great to hear from readers and I take time to answer queries. I can't always find what you are looking for, but I do appreciate getting thank yous no matter what the outcome.
Restaurant-ing through history 
Found your blog on a random search for “blue plate special” – and I’m loving it! As both a lover of history and restaurants, I think your posts are fantastic!! I live in Los Angeles, and am especially fond of the LA mentions. Do you know about Clifton’s Cafeteria?
http://www.cliftonscafeteria.com/pages/brookdale_home.html
The brookdale is still open, although with new ownership its future is iffy.
Funny you should mention Clifton’s because I’ve been thinking of writing about Clifford Clinton.
Thanks for reminding me about Coach House, hadn’t thought about them in years. I believe Batali’s Babbo now lives in that space. And also in this theme, when I was a waiter in the ’70s there was a diner’s card called “Carriage Trade Club” which gave you 2-for-the-price-of-one entrees. The dreaded beige card emblazoned (yes with carriage and horses motif) made our hearts sink. Always the worst tippers.