Same here, my mid-arm and fabric/thread/batting/etc are in the basement, but I sew and embroider on the dining room table. I'm able to leave my project there since we're empty nesters. It works out good that way - I get up and walk off the stiffness when I need something from downstairs.
However, our retirement house in Wyoming is a one story house (ranch with no basement) and everything fits into one big room. Can't wait for the day we can move everything in there!