It's pretty hard for any site these days (especially the big ones) to stop fake profiles and scammers from signing up, but I think I get what you're after.
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My first recommendation would be to try Lavalife's Intimate Encounters section; you sign up with them and then decide which of the three sections you want to be a part of (Dating, Relationships or Intimate Encounters).
You can use different handles in each section under the same account too, so no one will be any wiser if you want to advertise for one thing in one place without ruining your chances for something more should it come up.
And when I clicked on a picture, the city and/or state changed to someplace nearby... There has to be a legitimate adult dating site out there. "Welcome, Stephen, and thanks to my colleague, sexuality expert Cory Silverberg, for sending you my way.
To answer your question: it depends on what you mean by legitimate.
After Lavalife, I only know of a few others that are worth mentioning, although I've yet to find one that's truly ideal.
My preferences would be Club Intimate, Fling, Adult Match Doctor, and Get It On, As for adult dating sites that I don't recommend, see my reviews for Shag Pal and Adult Friend Finder.
Are you looking for an adult dating site that caters to adult encounters or casual sex, that isn't full of scammers or fake profiles?
If that's the case, I'll admit it's pretty hard to find.
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