Bob and Linda join a club where there is a live sex show every night. It is the members themselves who provide the show, and Bob and Linda are selected for this on their first visit.
A "Delights" novel (2) Part of the Kobekistan universe
One of the sporting diversions in Kobekistan is hunting in full English style - but there are no foxes, so they use slaves as prey, and the hounds are a bit different. Some of the quarry are more interesting than others. Another sport is breeding from selected females, and the Emir experiments using his mother and a group of his close associates as 'donors', making their donations at wild parties!