Well, first of all, a couple of housekeeping rules: Put some punctuation in your posts, it makes it a lot easier to read. And please don't post the same question in multiple forums.
Now, as far as discretion. If you don't want your friends to know, simply don't swing with or around your friends, and don't talk about it. Keep your swinging activities separate from your social and business life. But, since you've already told your friends (if I read your post correctly,) well, the cats already out of the bag. If that's true, I don't see what your question is.
The people you meet in the LifeStyle, at clubs, house parties or on-line, are usually just as interested as you are in keeping their secrets. I wouldn't worry about your partners discretion.