Back in my younger day hanging around with this unpredictable Asian cat, we would cruise in his hoopty looking for SWs. Later on, it got to a point where I was cruising on solo capers. I migrated away from it around discovering phonebook agencies, which kinda spoiled me because they were hot 'next door' girl types and didn't upsell in the beginning.
It's been probably about a decade since I've done any measurable SW hunting, and for good reason. They're nothing like what you see in the movies. Sometimes they have OK bodies, but the faces look like witches. A good (though not 100%) sign a SW is not real is how 'clean' and pretty she looks, as someone mentioned. Of course, she could be brand new and the lifestyle hasn't worn on her yet, or maybe a 'regular' gal that may be thrillseeking or looking to make quick ends meet and quit (many of them do).
With today's tools of hobbying at anyone's disposal, SW'ing is third world. That said, I can understand the thrillseeking adrenaline rush one would get from it. I won't go that way anymore, but if someone did more power to them.