Roose Hurro said
I have another twist on the binary idea... a Dyson Sphere around the companion star, the whole construct circling the primary of the pair. Huge, huge amount of space, enough to "house" thousands of civilizations at once. If not tens of thousands... or more. Actually created this for an idea of my own, but...Oops, almost forgot: This Dyson Sphere is habitable both on the inside and the outside surface. Like I said, HUGE huge surface area to play with.
That would be incredible, we could make a multiverse with that much space. =)