Methods, systems, and articles of manufacture for tracking users based upon wireless fingerprint information are provided. These include accessing proximity records, clustering the proximity records based upon time information and user information to generate a plurality of clusters, identifying one or more events based upon the generated clusters, and outputting information related to the identified one or more events. Each proximity record includes user information. User information includes at least a first user identifier and a second user identifier respectively identifying a first user and a second user, and time information. Time information specifies one or more times when the first user and the second user have respective wireless fingerprints that are within a threshold fingerprint distance of each other.