PaaRee, which also trades as Swingertreff4all, is a swingers meeting place at Castrop-Rauxel in the Ruhr. It is a sole proprietorship run by Mandy and Frank, and it describes itself as open, with standards, and tolerant.

The club works to a calendar of named party formats rather than to weekly hours. Its Wednesday session, the 'DATE-INN', runs through the middle of the day from eleven to five — an unusual slot, and the club calls it the erotic mid-week divider. Evening parties use staged admission: women and couples in first, men shortly after, then a welcome and an explanation of the format before things begin.

Two practical notes from the club itself. It is reachable by telephone from about three hours before it opens and while it is open. And admission to some of its themed nights depends on your profile stating the relevant interest — turning up without that is refused at the guest list.