void SpawnChair(Stencil s, ThingDef thing, ThingDef stuff)
 {
     if (s.Check(IsValidChairTile))
     {
         s.Spawn(thing, stuff);
     }
     if (s.Chance(chairPawnChance) && s.IsInMap())
     {
         GenCity.SpawnInhabitant(s.pos, s.map);
     }
 }