The ritual may have up to 10 women in cloaks and masks forming a circle around a High Priest. Surrounding the circle of women are cloaked and masked participants hoping to be selected by one of the women to participate with in the orgy. Above the ritual may stand observers. Observers watch without being candidates for selection by the women in the circle. The observers are required to be shrouded in cloak and masks as well as participants. Once the women enter the chamber and form a circle around the high priest. He commands the women to uncloak, leaving them dressed only in a black thong, shoes and mask. He then sends them one by one to pick gentlemen from the watchers on the first floor. The pair then goes off to another place in the mansion, using lounges, chairs, tables and enjoys each other carnally as the watchers, still in cloak and mask, watch them.
EWS Ltd is loosely based on this part of the movie. After all the women have picked their candidate for the following orgy, they leave the room, find the spot of their choice and enjoy carnal knowledge of each other. The watchers are invited to join in, watch, and dance. Basically it is a fun party.
WHAT IT IS NOT
In the movie the women in the circle are prostitutes. In the EWS Ltd circle they men and women are members who want to enjoy the thrill of meeting a random "stranger" of their choosing and having some fun. Nobody is forced to do anything they are not comfortable with. The couples may spend time getting to know each other, dancing, cuddling and chatting, If either party decides they do not want to go further they are not forced. However it is encouraged, as that is the basic purpose of the ritual.