Madame Lash gave the definite
S & M party in 1977.
"Its was set on the first floor of a warehouse in Surry Hills and the space was dominated by the structure of a huge rack".
The Madame herself gave the first demonstration of how to titillate, torture and torment the victim and then handed the entertainment over to the guests.
At various stages of the evening, by some unspoken signal, everyone converged. Torturers strapped victims on the rack and the fun began. Source: Sydney Diary - William Yang