Boudoir Bleu is an adults-only playroom in De Panne, let to couples as a short stay a hundred metres from the sea front. It occupies a second-floor apartment in a 1911 building at the edge of the Dumont quarter, and is one of four properties run by the holiday-let operator Happy-Stay.

The operator describes it as a playroom for adults where couples can go exploring together, furnished with a lounge, a tantric chair, ropes, a massage table and a cupboard of small extras, with the rest left to the guests' imagination. Check-in is contactless, through a key locker at the entrance, and bookings are taken through the operator's own site.