I think if they are mentioned here then they may be more motivated to carry proof of vaccination. Very easy to keep on your phone and Lord knows they always have their phone handy. No this is not perfect but if the f&$king club won't check.....
If not a boycott then call these girls out. Give us their names so they can be avoided. If they are proud enough to boast about their vaccination status, then they shouldn't mind seeing their names posted here.
I would think that all the girls at the Playmate know the environment they are working in. I don't think they would be offended if they were asked to go upstairs. I would assume the girl would say no and move on.