Re: Hugh/Theo, later that day
I don't think dogs come with a subtle setting.
We do, though I've never been to any performances. Generally, if you're born to a wizarding family, you keep to that world. If you're not, it's a mixed bag. Some keep their feet in both worlds, others leave the non-magical behind entirely. Very rarely does it go the other way where people swear off magic completely.
Not our own countries. Most have their own governments within existing countries, though.