Right. They did not want here to be a lot of coming-and-going so there could only be a few club-member guests at a time, and for very limited time (difference w. a hotel: a hotel accommodates the general public, not just members).
In the end, seems that it turns out under the relevant regulation Sole Owners would be considered part of a business’ staff anyway.
Extensive further discussion in this thread from earlier in the year.