There is a Tang Soo Do martial arts club at Swinburne University (Hawthorn campus, Melbourne) that also allows non students to join. Tang Soo Do can be likened to a Korean version of Karate, but this particular club is more of a blend of Karate and Taekwondo. Rather than overload this post, the website has a lot more info.
I'm a student of this club and have to say it's been a pretty good deal already in past years, but this time there is no extra fee for non students to join (used to cost about $140 per year when you added that). I think it was too much hassle for the paperwork to differentiate the two.
They train twice a week, Monday and Thursday nights 6.30pm to 8.30pm, Thursday being the main class.
So $78 for the rest of the year works out to about 50 cents a class.
For those who live around Swinburne University at Glenferrie station in Melbourne there's also a cheap (compact) gym at the university sports centre.
![[MELB] Tang Soo Do Martial Arts Lessons $78 for Rest of 2011 Hawthorn](https://files.ozbargain.com.au/n/15/45815.jpg?h=c561a7c4)

Interesting. Usually sports clubs have to charge more for non students to cover the insurance fees etc.. that are usually included in student fees.
I can't say that advertising your club as being like TKD and Karate is appealing… but looking at the website I think you are right. A warning to people that these kind of clubs aren't very good if you want to actually learn self defence.