Torei
Torei is a planet set in a far-distant future of human colonization of the galaxy. Torei has a long history of institutionalized sexual slavery of women, and is only just making contact with the larger interstellar human society. To some readers, Torei might seem like an Aeon Flux version of Gor.
Humans from the greater interstellar society visit the sheltered compounds on Torei's equator to get an experience somewhere between Prague in the 1990's and Dubai in the first decade of the 21st century. It is a raw frontier world re-opening for the first time, with the opportunity to live in glass towers coddled by an abundant servant class. But the off-world women must take care while on Torei, as diplomatic protection can only go so far...