In 2002, I took a guide-led "Spring Tour" semi-off-season trip with some college friends. There was one sketchy, bougie colonial-era hotel near Shenzhen where the rooms came with young women "masseuses". (Eww.) I assumed there were cameras in the room and turned that down. The structure was old, kept up, and beyond opulent. Indoor and outdoor shooting ranges. Hedge maze. Bungalow-villas.
There and elsewhere, I learned why there were so many "karaoke" bars. Probably things have changed, I hope.