http://www.rickross.com/reference/brethren/brethren8.html
This is a link to a video about a group calling themselves the Brethren, or the Roberts group, after their founder. These people seem more extreme than the jws, living on food other people throw away, refusing to allow medical care for sick members and having no real home. They just drift around the USA trying to make converts.
It seems like anyone joining them is expected to give away all thier worldly possessions, and live like a nomad. They aren't allowed to show emotion of any kind, and are told on joining not to contact their families, who are seen as enemies.
The women in the group are sunservient to the men, who are the ones who do the recruiting, and their leader, Jim Roberts, doesn't allow marriage, or hasn't done for several years anyway.