We have an Arizona room (called a California room in CA, lol) which is like an enclosed porch (it's actually part of the house, rather than like what my parents have where you go outside of the house and there's an enclosed area), so I walk past the kitchen, down a step, into a fully part-of-the-house room, heating, cooling, etc. I do it all in there. TV set up and everything.
And then quilts in progress get laid out in the living room, as long as I'm actively working on them (if not, the rule is they go away).
And sometimes the dining room table if it's available.
And the office, since the fabric closet is in that room.
But that's it :-D