We have been seeing these parties pop up more frequently lately. Maybe its cyclical in the community; not sure. However, they are for people who are sure why they are there and want to get into some nekid fun without the notion of investing many meetings or even hours and hours of prequalifying potential playmates.
Sometimes it's a result of couples being burned trying to meet couples two on two where they aren't who they say they are, sometimes it's couples who attend hotel parties where they have invested many hours trying to find the "perfect" couple only to realize at 2 am they passed up pretty good opportunities earlier in the night and ended up not meeting anyone, and there could be more reasons as well. Put simply, they want to get naked and have fun and aren't into drawn out games. Writing this, I'm not knocking the choice at all- in fact, in some ways I'm embracing it.
If you wait for the perfect couple or four-way match, you are most likely going to be waiting for a really long time. However, if you are open to considering a pretty-good match that, with a try or two, could develop in to some great friendships with benefits, then consider diving in. For a long time we didn't consider this idea and pissed away a lot of weekends and hundreds and hundreds of dollars. And then one night we attended a hotel party that was more like this- where the full intent was for people to get naked and play. And guess what.. it was awesome.
There were maybe five couples there. We got a few drinks going, played a lifestyle version of jenga, and before you know it clothes were coming off and fun was happening all over the place. Put simply, it was efficient. In the end we became friends with two of the couples, are connected as friends in real life, and see them from time to time at events.
Here's some unsolicited advice: When you see one of these events, look at who is signed up. View their profiles. If they are at least "maybes" in your book AND they have a couple of "certs", then consider giving it a try. People with certs are more-likely what they claim to be. And they want to preserve their reputations in the community of lifestyle people, so even if you don't connect or play with them, the likelihood is they are going to be very nice to you.