The easiest way to join or renew is through http://www.susf.com.au/membership-explained.html. Read the section relevant to you as a new or existing member. Table Tennis Club memberships ($35 for Students, $65 for Community members) appear under the gym passes on offer. For those who do not currently have SUSF annual membership, selecting the Table Tennis membership will automatically add the annual SUSF club fee ($60 for Students, $65 for Community members) to your purchase.
Alternatively, see the front desk at SUSAC to pay over the counter.