This image shows the dining hall at the Nut Tree complex near Vacaville, California. A unique feature is the covering over some tables and booths.
The description states:
WESTERN DINING AT THE NUT TREE
Interior of the Nut Tree dining room that specializes in Western Food. The Nut Tree, as part of the West, has contributed to the development o America’s newest cuisine, Western Food, for over four decades.
–What is called Western Food here has come to be more widely known as California cuisine. The fashions and the reference to four decades indicate this image is from the 1960s, as the original business opened in 1921.