Immersion
When learners are placed into a world where all business is conducted in a foreign language, they pick up the language "on the ear". Whether ordering a coffee or opening a bank account, you must use your English language skills to communicate. The virtual inhabitants of RendezVu will be happy to talk to you - as long as you try to talk their language.
Learners can be assured that this is a completely secure environment for learning - the inhabitants of RendezVu are virtual, you can't hurt their feelings !