Most Disneyland nuts know that the Plaza Inn was originally called the Red Wagon Inn. It was leased by Swift & Co., and "featured entrees of chicken pot pie, Swift's premium baked ham, Swiss steak, traditional chef's salad and a fruit plate." Mmmmm, fruit plate.....
There was a private VIP lounge in the back (complete with booze), as well as an employee dining area (no booze).
The top photo is an unusal shot of folks dining at the Inn, out on the covered patio area. From the smiles of their faces they are obviously eating premium ham (not that common back-alley ham served elsewhere). Sorry about the graininess, it was a very dark slide.
The second photo is a nice evening shot of the sign, with a sliver of Tomorrowland in the background. I'm not sure I've ever seen an exterior of the Red Wagon Inn in which the super-rare poster was in view, though it must have been there at some point.