[renang]

I see myself doing this for a short period of time, say one or week.

That's actually a plan I am making with some friends/coders. We may rent a nice villa somewhere in Spain for two weeks. Get some buzz and some work done. Would be nice to have ideas flowing and in the end we may leave with a product.

[mjn]

That kind of "retreat" is a bit more conventional I think. It's fairly common at large companies to occasionally send a team to Vail or Hawaii or a cruise or something for a week for team-building / brainstorming / etc. But you don't usually bring your family and actually move in with your coworkers; it's more of a business trip.

In a more researchy direction, there's a German institute that organizes these kinds of events. They have a castle in the middle of nowhere, Schloss Dagstuhl, which accepts proposals from people who want to use it to organize 1-week residential seminars on different subjects: http://www.dagstuhl.de/en/program/dagstuhl-seminars/