My sewing room is a 12X24 ft. room attached to a detached garage. An 8 ft. baseboard heater is usually sufficient to get going until the south facing slider door starts the solar gain process. Unfortunately winter decided to descend upon us with gray skies and much cooler temperatures. My electrician husband split one of the outlets so that we could borrow the garage circuit to plug in another electric (fan)heater, and after we got going enough to generate some body heat it was enough. In the future that room will have a gas heater that used to be in the house, but we're trying to get more of the house done before running the gas out there, and some of the "stuff" that's out there needs to move back into the house to create space for the gas heater.
After we ate our big meal, we were able to just sew and sew the whole weekend and graze on all the leftovers. I did make a Minnesota style wild rice soup with some of the leftover turkey, but other than that we just heated the leftovers. Luckily we all like and eat leftovers. There was not much cooking done after Thursday, and we weren't standing in check-out lines or otherwise fighting the crowds of holiday shoppers. I think I'd like to make this a tradition.