The Valley course at Portrush? The Portland course at Troon? Just askin'.
Not the Portland course, but the three munis in Troon (Lochgreen, Darley and Fullarton) are just about the epitome working class courses in Scotland I would say. Portland (and Valley in NI) do not fit that description.
The world's very first working man clubs were formed in Montrose in the 1840s, with men from the local jute factories. The very vibrant Mercantile Club (despite its name) is their direct descendent. Its clubhouse (still very much in use) was actually built by a local factory owner and handed it over brand new to the workers in the 1890s. JH Taylor joined as a summer member one year during his prime and won a medal or two.
In Ireland, Carne certainly fits the bill - it was built by the unemployed labourers, and many of them became members I suspect.
In Canada, the muni Kings Forest in steel-city Hamilton, sometimes in the country's top 100, is an outstanding course built for working men (and, to a lesser extent) and women. Its locker room still feels like a change room at the steel factory (where I worked briefly as teenager).