Well, Jews today are monogamous. The only people who still say it's okay to marry up to four people are certain Muslim countries, and a few other places where polygamy is legal. It's not legal in the U.S. or in Israel, which have the largest populations of Jews.
You please read, before you go posting these things. I've never met a Jew who said it was okay to be polygamous, in the present day. It may have been accepted in ancient times, but there is no way it's okay with them today. No mainstream or Orthodox groups, anyway.
The only thing condemned in the scriptures on Polygamy is that a Bishop must only have one wife. This part is ignored in the EO church, and bishops are not allowed to have a wife.
This means that polygamy was basically condemned by a council of men (bishops), none which were married.
Morally I do not find anything wrong with polygamy, I do believe it to be biblical and fine for men to practice. *Note* this does not mean I believe in group sex. This means biblical polygamy. This is where a man is married to multiple women, loves and cares for them all. Nothing about being a bully, dictator, etc. This means that his wives love him, and he loves them. They all work as a family.
Now, to stave off the questions, YES my wife agrees with me and says she is perfectly open to polygamy if that is where I feel God is calling me. However, I personally do not believe God is calling me to have more than my wife, as I do not desire other women emotionally or physically. I'm extremely happy in a monogamous marriage and want no more. Plus the honey-do list from two women would be incredible
As far as legality, I don't want to get into the issues because they could be considered political. However, I can state that the laws vary by state. Some states say it is okay so long as on paper the man is married to one wife, and the others just through his religion. Some states say that a man can't consider himself married to multiple women period. Some are more concerned about tax status, financial, etc.
As far as a woman with multiple husbands, this is not biblical. Since the biblical structure is for the man to show love but lead his family, and the wife or wives submitting. Also if there were two husbands and a woman were to get pregnant, without MODERN Science involved you would not know who the father was. It would ruin the concept of biblical lineage. On the flip side, a man with two wives, you would know who the father was.
It's not a popular way to think in our modern culture.... I don't have an issue with it myself, but certainly it is not my cup of tea.