Originally Posted by
Ekdog
...my heat-light wife uses a small electric heater to heat the space under a table. The warm air is kept in there by a sort of blanket that goes over the table. This used to be done with a tray of hot coals. The Japanese use a similar system, I'm told.
I do the same thing. It's called a kotatsu table. During the cold season I drape a quilt and a paint canvas over a folding table and put an electric heater under the table. The electric heater needs to be one that has a very low temperature setting and won't catch anything on fire. I'm reluctant to recommend a kotatsu to anyone because of the potential fire safety issues. But having said that, I like mine a lot and it works well.
ETA: And an electric blanket works great for me in bed.