I'l try to keep this relatively short. If any of you have the AMC TV show Mad Men (I'm guessing most of you've already have, seeing as it's a rather excellent show). Basically, it's the late 50's and early 60's and it would take place in the US. Society back then was a lot different - genders weren't equal, men could comment on a women's looks with no negative reprocussions, sometimes even it was encouraged. Though, there were beatniks, and that crazy, jungle music they call Rock & Roll was rather popular with the young 'uns. I would highly recommend reading up on those years, or just simply watch a show that's based around those times.
The scenes would be set in a suburban 'paradise', or in an large New York office, or even both. The size of the group will depend on how many people want to play. Of course, everything isn't set in stone, feedback and suggestions would be greatly appreciated.