Anyone seen Westworld? There are places, irl, that are kind of like 'living museums', without the robots, where actors and experts on the subjects recreate a small village or whatever. Plymouth Plantation in Massachusetts is one, but I'm sure there are others.
I was thinking it'd be fun to create and run an immersive "Main Street USA" that would recreate a past era for people to visit, as much in its entirety as feasible. I would change the era being recreated periodically, maybe once a year or every two years. There would be vintage cars, vintage shops, actors in vintage clothing, and experts on the era available to talk to and interact with. I'd have a movie theater showing films of the day. Stores, bars and restaurants would change to reflect the era being recreated. I would have to have a record store or two, of course. There would be some things that would be purely era-specific. If we were doing the 1940s, there'd be a dancehall with big-band jazz. If it were the '50s, there'd be small jazz clubs playing bebop and a Southern-style 'juke joints' playing early rock n' roll. If we were doing the 1980s, there'd be a video-game arcade. There would be some necessary anachronisms, of course. There would be no smoking, for example; there'd be no racial segregation or period-accurate gender expectations; bars and restaurants would abide by the current drinking age; the local fire station would have antiques for show-time and modern gear for go-time; and what we think of as ambulances and paramedics today didn't even really exist until the '60s or '70s, I don't think.
There's one twist: Visitors would be expected to play along. They would be provided with clothing that resembles the period. There'd be barbers and hairdressers who could give people period-accurate haircuts if they wanted them. You'd have to leave cell phones and laptops in a secure location, and there would be a train station some miles away where you'd park your modern cars and then ride into town. At the train station, you could rent recreations of vintage cars for the drive into town, instead of taking the train (the insurance could be expensive, even for a 10-mile drive on a closed road, but I bet some people would want to try driving a 1940 Studebaker or a classic Ford Mustang).
EDIT: I just thought of another thing. There would be recreations of newspapers and magazines for sale, and television sets and radios in the hotel rooms would have period shows, sports events, news broadcasts, etc.