Though the Club does not discriminate in its selection of members , membership is by invitation from an existing member only .
As of 2007 , membership at the Duquesne Club consisted of about 2,700 men and women .
Though the Duquesne Club does not discriminate in Duquesne Club 's selection of members membership membership is by invitation from an existing member only .
As of 2007 , membership at the Duquesne Club consisted of about 2,700 men and women .