Providing on-line registration services for entertainment, sporting, educational, and cultural events, namely, music concerts, theatrical productions, instructional classes, recreational activities, sports tournaments, sports competitions, sports camps, summer camps, social club services, and art exhibitions

Providing codes that are linked to an online database that maintains contact information about persons to whom particular codes are assigned so that others can communicate with them through the exchange of such codes which gives access to the contact information maintained in the on-line database