Green’s Dictionary of Slang

foundry n.

1. a shop, esp. a pork butcher’s shop because of the noise of the sausage machine.

[UK]J. Ware Passing Eng. of the Victorian Era.

2. (US) a restaurant.

[US]K. McGaffey Sorrows of a Show Girl Ch. ii: I was going to balk and rear in the harness when he started to lead me up the steps of the foundry.
[US]‘Hugh McHugh’ You Should Worry cap. 3: It never struck me that I had to take a course in French before entering the Builtfast hunger foundry.

3. see booze foundry under booze n., doughnut foundry under doughnut n.1 , hash factory under hash n.1 , nut foundry under nut n.2 and shicker-foundry under shicker n.