Well ordinarily they're the product of renting a structure that hasn't been maintained for decades, and the floors are literally falling apart underfoot, but you could always recreate the effect intentionally if you absolutely had to.
If you have a lot of time, buy a place and let it to go to seed. If you're on a schedule, buy a place and either tear out the floor to replace it with a purposefully weakened counterpart, or just dump acid in the cracks and throw a dozen bowling balls around for an hour or two. If you're renting, just look for a "middle price range" apartment in New York. /snark