We aren't currently in such a situation. Out dream is to eventually have a place large enough to have others living with us or near us so that we have a large extended family of amorati and friends around us.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.