My annual school review went well (yeah!), so I have a minute or two to post some of those cable car restaurants ... Unlike diners and rail car and trolleys-turned-diners, I have nothing to say about the "architecture" or any shared RR or popular design elements in these restaurant reuse examples. These cable car examples are pretty much "as is" and utilitarian. There's a rail car and lunch wagon example thrown in, too. This collection represents San Fransisco and San Fransisco as others in the world interpret it. 
Enjoy!
Tomlinson Run Railroad
Cable Car Coffee, San Francisco Municipal Railway (1912-present)
900 Market Street, San Francisco, CA
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Grubstake 1927 to present (a Berkeley, SF, and Oakland rail car and a lunch wagon built to be a diner -- I wonder where they got that? Surviving lunch wagons are rare.)
1525 Pine Street, San Francisco, CA
This place and its rail car's fate were up in the air when I first discovered it. The rail car's end just sticks out of the front of the building. It's incongruous, but there you have it. I'm glad to read that the restaurant is doing OK via this 2017 Post.
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Home edition
1632 Great Highway, Carville-by-the-sea (SF), CA. A house made from a cable car and a horse car; the second story is made from two cable cars. (OK, it's not a restaurant but it's got a kitchen -- that counts for something, right?) Gorgeous interior photo.
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Japanese Coffee Edition
Another SF Cable Car Municipal Railway example, car no. 8, some where in Japan (?) circa 2010, per this blog post.
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Apparently San Francisco and its imagery is a big hit in Bangalore, India. Some of these look like gondola cars to me but perhaps its just how they cut the cars to create individual dining spaces? There's the ubiquitous San Francisco Municipal Railway in maroon (?) and one in the railway's Powell & Hyde Sts. livery (see website for that one). It's kinda like those two U.S. spaghetti chains with their token trolley, only this hotel restaurant is more upscale and they serve only vegetarian Italian and Indian food:
Check out the hotel's website: 
