My sewing room is in the basement too and I have only one baseboard unit for the entire main area. I picked up a oil filled space heater to heat up the other half where I keep all the machines. It makes it liveable for me to sew now. This past weekend my boiler couldn't keep up with the extreme low temps and I couldn't sew at all. My furnace guy found out the prior owner had set the boiler at its lowest setting which wasn't enough to keep any part of my old 118 yr old house (no insulation) comfortable. Now its set at 200 from 180 degrees and its so comfortable for me. I was able to turn the space heater off on the 1st floor but keep the basement one on during the day when I'm down here.
I don't use my dining room much but wouldn't want to damage it with pins, etc. Just my opinion. We do what we need to so we can keep up with our hobbies. Good luck.