The Sinner Circle is an exclusive night out for open-minded women and couples, and its pitch is unusually specific about the gap it set out to fill. It exists, in the organisers' words, for people who are open-minded but find the step into a parenclub too big or simply not their thing — a stylish evening with like-minded people rather than a club with a dress code and a darkroom as the main event. Their own framing: step into the exclusive world of The Sinner Circle, where open-minded women and couples enjoy a stylish night out in complete freedom, with an relaxed and respectful atmosphere as the standard.

It has no premises. Each edition is held at a carefully chosen location — the city is announced in advance, the exact address only goes to ticket holders shortly before the night — which is how the guest list stays closed and the atmosphere stays what the organisers want it to be. So far that has meant central Utrecht.

The evening is built around dancing, music and meeting people, with drinks and bites, a welcome drink on arrival and a DJ rather than a programme of shows. There is a small, simple darkroom on site for anyone who wants to withdraw discreetly, and the organisers are refreshingly honest that it is a basic extra rather than the point of the night: the focus stays on the energy on the dance floor.

The door is for women and couples aged 18 and over, with valid ID required and no refund without it. Couple tickets must actually be used by a couple — male-female or female-female — and no single-man ticket exists. The dress code is casual-to-sexy chic: look stylish and sexy, smart trainers are fine, sportswear and hoodies are not, and at a masked edition the mask is part of it. Photography and video need prior permission. Browse EroticAdvisor for the next Sinner Circle date, its city and its dress code.