Is there an area I'm not finding on TER where I can locate providers who is open to performing a threeway?  I met an escort who is open to it, she lost her doubles partner and doesn't know anyone.  Any suggestions?  Ideally tiny, cute and loves Greek travels...

... researching doubles reviews for local providers?  Try searching for Name = and.  You'll also get names with "and" in them but it's easy to screen them out.  You can include Anal in your search.

providers who are "really bi" in the search options.

... that many providers have "really bi" on their profiles to allow them to get an extra point on Performance, under the old review rules. That's why I recommended looking for duo reviews, which give some indication of how "really bi" the providers are.

I can give you some ideas but having a location would be more helpful.

Massachusetts, Metro-west suburbs is home, close enough to Boston though

in reviews. You'll get "Sandra", but you'll also get Sarah Michelle Geller AND Tina Fey. (Wish ...)
Of course, many women who do doubles don't have reviews for their combos.

... a "/" in the name field means the provider has changed her stage name at some point.  It doesn't indicate a doubles review.  

lol....right, not quite the same thing is it, lol...whatever, I'm tired of scouring for info