We have recently moved into an Edwardian semi-detached property. Several evenings a week, the back room, which we use as the playroom, smells very strongly of food, and it's definitely not ours. This is very puzzling because this particular room doesn't share a wall with next door's kitchen. I don't know if this sounds ridiculous but I think that perhaps the smell seeps through the floorboards. We have original floorboards and there are some gaps between them. There's also a fireplace. Is there anything we can do to stop the food smells from reaching our property, preferably something that isn't structural? TIA.