System for determining user preferences

The invention relates to a system for determining user data, particularly user preferences or evaluations. The system comprises a multitude of mobile end apparatuses ( 1 ) which may be integrated in a portable apparatus such as a mobile phone or a watch ( 7 ) and are carried or worn by members of a group. The mobile end apparatuses ( 1 ) can establish a wireless communication with a central unit ( 2 ) and particularly transmit user data stored in a memory ( 4 ) or current user data detected via sensors ( 5 ). When using the system, for example, in a discotheque, the visitors favorite musical genres as well as an evaluation of the current program can be determined and taken into account. Via corresponding sensors ( 5 ), implicit evaluation criteria such as, for example, the movements of a user can be detected.