Aside from having to outright ask each wonderful lady individually, is there a good source to find out who is open for doubles?  I have had a bit of a time finding that lately.  Clearly I have been asking the wrong people.  Suggestions?

You also need to read the websites in their entirety.  Many of the providers will state whether or not they do doubles and some even list who their partners are.

Most girls have a few friends they provide with. I use to have a double ( Claire ) but no longer I am always open to play with another girl if she is not play bi. Must have chemistry and not fake it..other wise no steam !