According to Detroit writer Naomi Spencer , they serve also as `` a last resort for homeless people to find respite ( relief ) from the cold , especially those with drug addictions , mental illness , or criminal backgrounds , who may not meet requirements imposed by some homeless shelters or religious charity operations . '' According to Detroit socialist writer Naomi Spencer , they serve also as `` a last resort for homeless people to find respite from the cold , especially those with drug addictions , mental illness , or criminal backgrounds , who may not meet requirements imposed by some homeless shelters or religious charity operations . ''