The "private
live show" booths at the back of some porn shops and strip clubs, where a girl strips, masturbates, and/or inserts dildos on the lighted side of the glass, while the paying customer jacks off in the dark on the other side of the glass. A few of them are fronts for prostitution or have glory holes, but most are just places for a
guy to have a quiet private yank on his crank while a pretty girl shows off to him.
Sandy got
tired of guys trying to get under the G-string when they tucked in a bill, so she started working at the slut in a
box club.
He didn't have the money for a hooker or even for a rub-and-tug so he ended up going to a slut in a
box.