From Wired, an article about Japanese love hotels from a book "Love Hotels" by American photographer Misty Keasler:
For decades Japan's love hotels have provided a place for couples to enjoy anonymous, uninterrupted sex. Politician and secretary, teacher and student, husband and hooker -- all are welcome, as long as they pay in cash and leave when the time limit is up. But 2006 spawned a new type of love hotel. Decorated with theme park interiors and equipped with game consoles, karaoke boxes and sex machines -- these establishments provide kinky fun for all types, from fetishists and sadomasochists to the ordinary couple seeking sexual adventure.