I'd broach it and discuss it before jumping to lawyers, which are expensive. Although a preliminary consultation with a lawyer can help you get the lay of the land. Maybe consider moving out on a trial basis and discuss it with her (and a lawyer in that scenario because you want to protect your rights vis-a-vis the kids). But if you do move out, find someplace that is cheap, convenient and won't take too much time to refurnish, etc. so you can focus on yourself and the relationship. Sometimes time and space can clarify things.
I posted the above and forgot to mention that the location is primarily used for the BDSM community, but the swinger club is a separate thing that uses the space.
Thanks. My guess is that such groups are hard to find because people are at different stages and eventually leave them behind. I'll take a look at the suggestions; I think I might of have stumbled on a few of them before. It's too bad they seem few and far between -- both listening and talking would be so helpful in this situation and there is only so much you can burden friends and family with, especially if they aren't going through it.
Does anyone have leads on places I can find DMV area support groups for those in the midst of separation and divorce? My Google skills seem to be failing me. Similarly, anything for single father parenting issues would be appreciated.