The Griffith University Social Night can be accessed by Members of TBT who have paid their TOP-UP Membership Fee under the Terms of the Joint Venture Agreement with GU. So you must be a member of TBT (6 months ($30) or 12 months ($60)) if you wish to play at GU Tennis Centre. You will be charged $14 (discounted rate) for the Social Tennis on the basis of TBT using its own balls or using GU-used balls. As more players from GU join in, the fee will increase to $18 and GU will supply all balls.