I wanted to be in a group with other US members, because we have different challenges then the rest of the world, or so it seems to a layman. Mostly our different diet opportunities, our different portion sizes, and our different views.
The US is HUGE, much bigger then most folks not in the US recognize. But there are some common elements across the country.
That said, if anyone else wants to join the group I'm game for that. I'm not trying to exclude anyone.