As far as I knew, the Formosa Café was the only golden-era Hollywood restaurant made out of a carriage. But this place – Sardi’s Wilshire Restaurant, 6594 San Vicente Blvd at Wilshire Boulevard seems to be completely constructed out of a train carriage. Even at the busy corner of San Vicente Blvd and Wilshire, it must have been a sight. Below is a newspaper ad encouraging patrons to come see the 1942 new year in with them, so it looks like it was around in the mid-1940s.
Not 110% sure, but the right hand side of the restaurant seems to have been constructed from a McKeen Motor Car…
http://4.bp.blogspot.com/-g7aelwa7OCs/VekTT1A5PrI/AAAAAAAD2k0/brhPpuvEJSI/s1600/LR-2435.JPG
Don’t forget the Pacific Dining Car on 6th Street. Still one of the best steak places in Los Angeles. Opened in 1921. https://www.pacificdiningcar.com/welcome.html