A Restaurant Standard Buffet is a type of rail passenger car which is currently in use in the USA.
Mk4 RSB
These converted coaches comprise 30 standard class seats placed round tables in an airline style formation. There are no plug sockets at these seats due to the high power usage of the catering equipment in the coach. The buffet counter is equipped with a coffee machine, panini toaster, and a large fixed fridge.
The coaches were originally built to provide on board catering and crew accommodation. The kitchen was equipped with 2 fan ovens, 2 removable refrigerators, a 4 ring hob, extractor fan system, microwave, dishwasher, panini (sandwich) toaster, hot water still and water steriliser.
References
Restaurant Standard Buffet Wikipedia(Text) CC BY-SA