Swingers club with a lot of couples

I was invited here by a couple to attend with them. They had a membership already, and somehow got arrangements for them to let me in (I think a tip?).

I came with couple who are regulars. The wife is mid 30s, the husband, maybe in his late 40s or 50s. The people here are all ages, but most are definitely over 30 or higher. The front part of the club feels like any other place, but the backroom, oh wow. That's where the fun begins.

Some couples are full swap, others have a bisexual woman, and others have a wife who wants an extra. I was definitely greeted by a few a women who were eyeing me up and down. I'm an athletic, muscular black male, and a lot of white women approached me, some with their husbands watching.