My old housemates were the opposite lol. We tried saving every penny on heating costs. In the winter, we taped the windows over with cardboard for better insulation (they are old single-pane windows), and fashioned an automatic door closer from an elastic cord to keep the door into the living room shut (our “warm zone”). Instead of using gas heating, we mined ETH with our gaming PC’s (this was before ethereum went proof-of-stake). Between the three of us, the total energy output was close to 2kW, so totally viable for keeping the living room warm. Pretty sure we ended up earning money from heating the house lol.