A peep show, peepshow, or, a peep booth is a presentation of a live sex show or pornographic film which is viewed through a viewing slot.
Boy viewing a peep show at an American carnival in the 1940s
The former Lusty Lady in San Francisco, California
The marquee for the Lusty Lady peep show in Seattle
The Mutoscope is an early motion picture device, invented by W. K. L. Dickson and Herman Casler and granted U.S. patent 549309A to Herman Casler on November 5, 1895. Like Thomas Edison's Kinetoscope,
An 1899 trade advertisement
Mutoscope at Herne Bay Museum
Mutoscope in San Francisco antique arcade