Outfit opinion for a swingers club

Sof

So this Saturday my bf and I are planning on going to a swingers club. He already went once years ago but it’s the first time for me. Well, the only thing I still need is a really sexy outfit and I was thinking about buying this set from Hunkemöller and a kimono. My bf says it’s too much, therefore I‘d be glad to get some advice/opinion from „experienced“ swingers.

The set:

The kimono: