
It’s 7:30 p.m. on a Thursday evening and I’m surrounded by around forty people, mostly couples, sitting cross-legged on a matted floor while an instructor demonstrates how to tie a knot around a partner’s wrists.
There’s an even mix of old and young, same-sex and mixed-gender pairs, most of whom are listening intently, while a few more experienced participants have already moved ahead. I spot one topless man completely bound by a tall, distinguished-looking man in a suit — they’ve clearly brought their own rope.