At the extreme Personal Ads of the event participants submit to the organizers a arrangement of who they would like to provide their contact hash to. If there is a match, contact cue is forwarded to both parties. Contact hash cannot be traded during the initial meeting, in form to reduce pressure (especially on women) to accept or reject a suitor to his or her face.
Participants can come alone without reaction out of place; alternatively it is something that women who like to go out in groups can do together.
