A method for minimizing the reintroduction of two people at a successive social event comprises the steps of assigning each person wishing to attend the successive social event a unique identifier, obtaining characteristic information about each person wishing to attend successive social events, the characteristic information having at least two potential values. An event identifier is assigned to at least said first social event and said successive social event. An event history associated with each unique identifier is created, the event history having elements corresponding to information about each event the person associated with the unique identifier has attended. A person is allowed to attend the successive social event dependent upon a rule for screening attendees, said rule being a function of said characteristic information and said event history.