There's a lot of immaturity here, it seems to me. I don't think any of you are ready for multiple partners. The drinking, game-playing... it all reminds me of Junior High School! My suggestion would be that you all grow up a bit. Nurture your marriage so that it's strong and you all know how to communicate and support each other. Maybe that would mean therapy, taking relationship workshops, opening your eyes to really see the people you're hanging out with, and looking at the drinking as a possible problem here.
Also think about the fact that lots of women who are bi-curious, or even have crushes on other women, ultimately don't really want to act on those crushes or ever actually pursue their fantasy. I mention that just to caution you. Any kind of exploration should be for yourself and your own healthy exploration of your sexuality, not just for your husband's pleasure.
The world opens up... when you do.
Oh, oh, can't you see? Love is the drug for me. ~Bryan Ferry
"Love is that condition in which another person's happiness is essential to your own." ~Robert Heinlein