SweetiePie: I may need some clarity with an example.
I assume that your example points towards the gentlemen from Augusta. I didn't include them in my previous post because their cause is different to the R&A. Their treat may be that top positions which traditionally are the source of their membership are now no longer exclusively male. Thus they have to open up just to embrace the whole country's elite, if they wish so.
Apart from that, there are a lot of perfectly justified examples to exclude a part of the population, starting with soccer clubs which do not need to embrace chess players. Other, more relevant examples cover nationality, language, education, gender, religion etc.