Events are at the core of added value and impacts for the events industry. Business at venues depends on the events they host. The Calculator Cleo uses the same approach: venues are assessed on the basis of event assessments. In the Calculator Cleo, all event assessments require the prior configuration and annual updating of the venue. When a venue manager configures a venue, its event organiser clients are then able to assess their events free of charge. With the Calculator Cleo, the venue manager thereby enhances the range of services provided to clients. The Calculator Cleo can also generate annual event business reports for venues by aggregating the results of the relevant hosted events. The greater the number of events assessed, the closer the venue managers’ performance reports will be to their actual business. The generation of consolidated reports for venues guarantees data confidentiality: a venue manager can in no way view or extrapolate data on the events of its organiser clients.