You said you haven't attended a "formal event" in a while. Is it because you have made your connections and are satisfied with circle of friends you have now? It seems like the kind of scene that loses something after the initial thrill has worn off. Pure conjecture on my part.
If KK is hankering for a "controlled gangbang" is this the solution for you guys? I understand arranging one on your own can be problematic.
We've been doing the hot wife thing for more than twenty years now - we've figured out what works for us, and what doesn't. Neither of us are swingers, at least in the colloquial sense, so there's some inbuilt disingenuousness associated with visiting swinger clubs, or being part of private swinger circles - that's not really our interest.
KK's favorite sexual pass-time is engaging in sex with multiple men; from MFM threesome play, to full on gangbangs. As anyone in this lifestyle can attest, even something as (seemingly) simple as an MFM encounter is logistically hard to arrange. A gangbang is exponentially more complicated to organize. In the early times, the swing club gangbang was kind of a compromise - it addressed the venue issue, reduced the planning and logistics effort substantially, while offering a reasonable outcome - i.e. KK was going to get fucked by several men, pretty much guaranteed.
The downside is this approach limits the ability to screen and select partners. In general, the center rolls the dice, and takes on all cummers. Of course, there's always the ability to say "No," or reject / constrain a banger. We found that to be a little problematic, because it put pressure on KK to decide if a guy was worthy of a fuck, and if not, or if she didn't feel attraction, thought the guy gross, or creepy, it put pressure on her to reject him.
The other thing is the condom rule - I can't think of a single venue of this sort we tried that didn't mandate condoms. KK prefers bareback. In addition, she has a mild latex allergy, so we always had to be prepared with lots of non-latex condoms and compatible lube. Further down that rabbit hole, many true swingers have what they call "blood bond" commitments - essentially a promise not to have unprotected sex with anyone other than their committed "blood/fluid bond" partner. In some swinger circles and groups, you get shunned for unprotected sex.
We've gained enough experience at this point in our lives such that the benefits of a swing club / group don't have much appeal, as we can figure things out on our own.