I would highly suggest whoever you meet you find another girl who is truly bisexual and experienced. Otherwise it might turn her off for a very long time.

It's a couple. one oft fave things to do and have lots if experience even outside of this, and yes being bi is a must!

The most important thing is to make sure the lady you are bringing into your bed is really bi.  Also make sure that the lady doesn't pay more attention to you than your wife.  

A swingers club or a swingers meet and greet or a provider is definitely the way to go as finding a willing lady somewhere else will be quite difficult.   Also make sure to hat if she is married that she has a hall pass.   My ex bad I did a threesome with a married woman that supposedly had a hall pass.   Her phone was ringing right as she and I were giving my ex a doubl BJ.  Lol.  

Good luck.