I expect someone else has seen this but 32 weeks ago (May-Jun 2016), Transformer DC were holding Shibari classes.
Shibari is Japanese bondage:
"In the late 1800′s and early 1900′s a new form of erotic Hojo-justu evolved, called Kinbaku, the art of erotic bondage. Today, particularly in the west, the art of erotic bondage is typically called Shibari, which is an art of erotic spirituality, not a martial art.
Shibari style rigging creates geometric patterns and shapes with rope that contrast beautifully with the human body’s natural curves. The ropes and their texture provide contrast to smooth skin and curves. In Shibari, the model is the canvas, the rope is the paint and brush, and the rigger is the rope artist."
http://www.artofcontemporaryshibari.com/?page_id=29
The teacher is called ropebaby: