I've been on the swing scene and bulled cuck couples here in the UK for years, I wouldn't say site's like this one are a place I'd recommend but of the you never know.
I've never really used specific swing, dogging or cuckold sites or groups either although that's were I'd recommend you start looking if you haven't got a foot on the ladder yet. Back in the day when I got involved in the lifestyle the internet wasn't really a thing, I just happened to land myself in the right place at the right time gaining experience and a reputation. To this day my wife and myself keep our meets within a fairly tight community of people where all recommendation, requests and meetings are done by word of mouth, invitation and vetting. Our circles keep growing through the involvement of friends of friends etc, it keeps things discreet and unique which suits us down to the ground as we offer very unique experiences. We have zero tolerance for people/couples who aren't serious about the lifestyle or dedicated to submit if they're new to the scene, I'd personally recommend this route, there's a lot of time wasters out there. These days I 95% only bull cuck couples with my wife who plays out her Dom side with the cucks, if you're a single guy then fine, bull those cucks on your own but beware threesomes can get messy bruh, bitches can catch feelings for you, you need to have the mindset to make sure you disconnect.