A group of people is having regular fun, eat food, exercise. Do you suspect they discriminate based on race?
Unlike reading clubs, yachting clubs, AA etc. there seems to be just nothing else that brings these people together. Maybe you know what it is?
(I am not American myself but I recall there is a significant percentage of non-white people yet I saw zero on photos of the club in this article. There is clearly a nostalgic vibe throughout the text, the question is how far it goes.)
PS. Feel free to explain what does using a throwaway have to do with it if you want. This acc is the one I'm logged in atm but also yes I don't want to implicate my main in controversial topics like this if tides turn and bringing up these questions is again prosecuted with something more than downvotes on HN. I have been following you for a while and didn't expect you to be pro real name policies.
Maybe the article photographers had a bias for white people, that would be more plausible, but I can't see how any group today (that isn't explicitly a racist/extremist group) would ban races from its members.
Addendum: To be clear I do not support forced racial equity / reverse racism, but considering the history I would expect article authors to make a bit of extra effort to show diversity on photos if there is any (and if there is none it just begs the question, no offense).