My last job had me rolling through the Dakotas (and occasionally into Minnesota) every couple of weeks. As far as I could tell, that meant the poly population jumped from 0 to 1 every time I visited.
As that company laid me off in April, I'm not driving that way any more. I'd start looking on OKCupid, for starters, to find somebody up that way.
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.