Hmmmm..A COVID testing party? Kinky (kidding). I'm guessing you would find some ladies that wouldn't object to it. I'm just not sure how the management would feel about it though. I heard that some brothels provide the tests already for ladies on a voluntary basis but could be wrong on that.
In any case, as long as you know that the rapid test is not as accurate as PCR, is Antigen based and depends upon the amount of virus to be detected. In other words, you could test for it but still run the possibility that one or both of you may still be infected.
I'll be interested to hear what others say..