Unless you've seen the original source of the photos, it was a tough one - lots of late 20th c. design "clues" at work here.
And the correct answer is....
The results of the survey we took are a pretty close to 50/50 spread between "now" and the "eighties". The "sixties", "seventies" and "nineties" all were well represented as well, garnering around 25 votes each.
Here are a few more photos of the space as a reward for all your hard design decade detective work....
Check out the full slideshow at House & Garden.