There was a chain of restaurants along the railways which featured women staffs and intended to be the 19th century equivalent of “family friendly” I want to say “Gibson Girls” but I thinks that’s wrong.
As part of the concept, waitstaff would be garbed in 1920s railroad and trained in those mannerisms. Polite discioline. No Texas Roadhouse chaos (which is actually a great chain).
You were almost right but it was the Harvey House and the Harvey Girls you were thinking of.
There is a fascinating write-up on the Fred Harvey Company and the Harvey House chain which catered to the railroading public. It can be found on a site which is used for all kinds of research :)