I have a female friend in San Fran who is, as she puts it, down with doing a threesome, so wanted to do some research on TER before my next trip out that way.  

Was wondering what the best way to do this is - there is no "couples" option, so do you just search for "two girl action - really bi" and then contact the provider directly to see if she is couples-friendly?  Also, how can you find reviews for this type of encounter, or are the doubles reviews a fair representation of what to expect?  

Any advice would be appreciated.  I do not mind doing the research, just wanted to know what has worked best for others.  

PS:  Any providers who want to nominate themselves, please send me a PM.