Consumer electronics are actually the only real problem as (radio aside) those didn't start becoming common and affordable before well into the postwar period. The rest? Beach volleyball is more or less
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, about the most modern clothes on display are
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and
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(both predate the Great War), motor buses are
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, private cars were affordable to even the middle classes by the interwar period (at least in the US due to economies of scale), striptease in diverse forms has a
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...
Just throw in the grim social realism of more critical period observers and/or the
noir genre, to speak nothing of "misery lit" depictions like
Angela's Ashes, and you're already pretty close to the setting of the game. Which really just jacks up the nastier aspects of life at the bottom of the society (arguably not even by all that much which is kinda depressing when you think about it) and throws in some blatantly supernatural details for color.