There are some things that are totally unambiguous, let’s get them out of the way: Silence doesn’t equal consent. Not protesting doesn’t equal consent. Being at a fetish club doesn’t equal consent. Being in a darkroom doesn’t equal consent. Sexual desire doesn’t equal consent.
Every sex-positive space has a different set of rules, etiquette, protocols and expectations of their guests. Before you rock up to a fetish night, it’s your responsibility to learn and respect the community by acquainting yourselves with the rules of that specific space.