Braseros

It's not a complex idea. When I was a lad braziers were the natural complement to those little striped tents that workmen used to set up over what were then called manhole covers. In Spain they put them under round tables.

Braziers or braseros are, at their most basic, simple bowls which fit into a circular support underneath a round table. There are electric ones nowadays of course but the one we were presented with today, when we went for a birthday meal, was more like a wrought iron version of a parrot's cage. Glowing embers are put inside the bowl, the bowl is popped under the table and a heavy tablecloth draped over the table and your knees. The heat captured under the table warms the lower half of your body. A very personal sort of heater. The modern thermostaically controlled electric heaters do the same job and have the advantage over the old fashioned, real fire type. They don't either set fire to their users or poison them with carbon monoxide.