How do you ensure sexual health at a club?

Does the club ask for recent test results, or just use barrier protection (ie condoms etc) all the time?

(I've seen reviews of my local club where people have said about not using so Dom's, so I'm a little unsure)

Also same, with hookups?

Previously I was generally, I'm ok with unprotected oral, if the person has tested clear and I trust them to have tested/ had safe sex, and would only move on to non-barrier protection after a longer term dynamic is established.

I'm less sure in swinging circles, given the higher than average sexual contact that is likely between people here, Vs my kink and polyam scenes

I'm polyamorous so am familiar with regular testing and use of barriers, but entering swinging feels very different

Completely new to this, and still learning, so advice is greatly appreciated