Window unit stored in closet of spare bedroom. Hasn't been used in at least 5 years. Ceiling & window fans take care of things. There are a few days when I wish I had air conditioning, but those are rare and I survive them.
I think I may ride it out a few more days as the basement is cool. I have slept on that couch many times (no, not due to a dispute with a S.O., just watching boring TV).