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).
I had to look it up.
The practice of training people to obey rules or a code of behavior, using punishment to correct disobedience.I'm thinking using lead weighted leather saps reminiscent of 1920s times.

The Boston Leather Model 5413 is one of our line of Denver Sap Impact Weapons. This sap features a looped handle to help you keep a grip on your sap no matter the conditions. This model measures in at 9" long and weighs 10 1/2 oz. Despite being small enough to fit in your pocket, this sap can dish out a surprising wallop with a flick of the wrist thanks to the spring steel in the handle. This Boston Leather sap is constructed with two layers of durable, heavy gauge leather that encase a molded lead weight. All Boston Leather saps are made in the USA.