The term I'm thinking is "pastiche". I usually apply it to "Disney World" type of items or places that try and recreate the feel of a different time. Some "speakeasy" bars fall in to that category.

It's like skeuomorphism, a bit... Wikipedia summarizes the big pieces at https://en.wikipedia.org/wiki/Skeuomorph

I was about to reply "steampunk"...but, no, that's not the right term either. Now, i'm curious myself.