Adult video arcades are X-rated

X-rated

In some countries, X is or has been a motion picture rating reserved for the most explicit films. Films rated X are intended only for viewing by adults, usually legally defined as people over the age of 17.-United Kingdom:...

 movie previewing areas. They are
almost always attached to a sex shop

Sex shop

A sex shop, erotic shop is a shop that sells products related to adult sexual or erotic entertainment, such as sex toys, lingerie, clothing, pornography, and other related products...

 or an adult book store (ABS), where magazines,
movies, and sexual aids are sold. An arcade consists of typically a dozen
or more private (or sometimes semi-private) viewing booths, containing a
video monitor, a panel of controls, and a seat. Sometimes these booths are
arranged in a maze-like fashion. Often the lighting will be dim, perhaps only red or green lights near each booth, indicating their availability.

Transactions

Movie time is purchased either by coin or cash activation within the booth,
or by purchasing tokens or a block of time in advance. Generally a
selection of 15 to 50 movies running in DVD players is available for browsing. New video systems operate with computers and provide a selection of several thousands movies. The worlds largest system is located in France, Paris (Date stamp Jan. 2011). The system in the Club 88 http://www.privateclub88.com/cabines-videos/ provides more than 30,000 movies in more than 70 video booths. These movies are straight, gay, bisexual, and sometimes transsexual. Some more modern systems display more than one screen at a time for easier selection.

Fixtures

In most ABS, the arcades will have "buddy booths." These booths are
adjacent, and allow for interplay between occupants. Some of them have
windows so "buddies" may watch each other masturbate. Between other booths
there may be glory holes

Glory hole (sexual)

A glory hole is a hole in a wall, or other partition, often between public lavatory stalls or adult video arcade booths for people to engage in sexual activity or observe the person in the next cubicle while one or both parties masturbate. The partition maintains anonymity...

 for oral sex

Oral sex

Oral sex is sexual activity involving the stimulation of the genitalia of a sex partner by the use of the mouth, tongue, teeth or throat. Cunnilingus refers to oral sex performed on females while fellatio refer to oral sex performed on males. Anilingus refers to oral stimulation of a person's anus...

.

If a glory hole is to be found between two booths in a video booth at an adult bookstore, the person who wishes to perform oral sex will normally be seated in his booth. Although not a hard and fast rule, that seated (and sometimes kneeling) position commonly signals to others that they are there in order to perform oral sex - which allows those who wish to receive oral sex to take the adjoining booth. That second person, who wishes to have oral sex performed on them will take the adjoining booth and normally remain standing. A number of ABS require and enforce that
movies be operating at all times while arcade booths are occupied.