I recall a documentary about a primitive tribe in a jungle somewhere. Evidently, their principal contribution to civilization has been forgotten or has yet to be realized: they had constructed a large hut on the perimeter of the village, which was used exclusively to house women during their monthly visitation. At other times they were allowed to return to their family huts.
The folks at Ruby Ridge had a small shed for such times. Such practice is not unheard of in certain nominally Christian religious groups, right here in the USA.