De Koleblomme is a small swingers' club on the Grote Steenweg in Zevergem, part of De Pinte south of Ghent. It describes itself as an erotic, sexually active café with a relaxed atmosphere, where swingers, singles and couples meet, and it runs its evenings to a published agenda: swingers' and get-to-know-you nights, fetish and trans nights, bondage evenings and afternoon parties.

Inside there are showers, towels and lockers, and several play areas: a darkroom, a glory hole, a separate seating area and a cuddle room. Drinks except champagne are included in the entry at every party, and no food is served. Single men should book ahead, as their numbers are capped against the number of women and couples present. Phones and smartwatches are not allowed inside, and there is a large private car park out of sight of the street.