peep show 
noun
1A sequence of pictures viewed through a lens or hole set into a box, formerly offered as a public entertainment.Queen Mary unearthed a peep show, an ingenious toy which pulled out in concertina fashion to a length of 30 feet, showing the coronation of King George IV in 1821....
- They were like a tragic peep show, a fast-forward of innumerable slides to give a glimpse of realms unknown, and frail.
- It's a peep show of sorts revealing a building in decay, its infrastructure on life support.
1.1An erotic or pornographic film viewed from a coin-operated booth.As one user commented, ‘it's a bit like a peep show in a sex shop.’...
- In addition to strip clubs, peep shows, and massage parlors, a large number of prostitutes walked the streets.
- The funny thing about this opera house is it's located at the end of a block filled with sex shops and peep shows.