Tagging the environment gives users the possibility to explicitly construct and define parts of their spacial context. The tags assigned to RFID- identified objects in the environment can be used to enrich formalized domainspecific context-models with user generated keywords to take communityand user-generated meanings into account. These references in space help to navigate information and services about the identified objects and provide a source for adaptation. We've chosen the domain of fitness and health to build and evaluate a RFID-based software-prototype. This paper presents aspects of this work and reflects it on the theoretical background of context and context-awareness.