TER General Board
Personally - for me - when I do doubles with either of my girlfriends (ShannaDFW or Tori of ATL) we cater to what the gent is wanting. Some want just all the attention on themselves, others want the interaction you described.
As to what I PREFER? I love to play with girls. Who wouldn't want to? They are soft and pretty - and kiss so nice and taste so good 
If you can't find reviews on a pair, ask if they have reviews you haven't found - or simply spell out what you are wanting in an ISO in your area.
I do not have an issue when doing doubles if the ladies make it clear upfront that they will not be comfortable with bi play. Let's face it, you have to start somewhere and it may be a first double session for one of the parties involved - I usually look at the first session as the ice-breaker to raise comfort level and experiment - then the second doubles session with same ladies I schedule expect play across all borders, but make that a clear expectation up front.
I do have a double penciled in for next month - and for one of the providers, this will be her first time - along with my ATF - we have both already tried to smooth out the ground for the session and make the "newbie" as comfortable with the idea as possible. I honestly do not know what to expect, but would NOT want either lady to be uncomfortable - not an issue with my ATF as she loves to play bi.