I agree with jcbicouple, as we are in the same "boat". We have a single male friend that we play with often outside of our circle of friends. They all know about each other and are fine with the arrangement.** Finding the right guy for us wasn't too hard, but it did take longer then 2-3 weeks. Just make sure that you talk about everything!!! Take your time and get to know the person so that you are sure you are all on the same page.
**This would make an interesting poll. (If I only knew how to post one.)
If you had a circle of regular play mates that didn't like the idea of a MFM situation and you did. Would you tell your play mates if you met someone single that you wanted to play with?
facelick