I don't doubt that Grace is a member, but it is very easy to get in. One person can bring in an entire group rather than only getting a +1 at other private members clubs like The Ned, for example. I believe they favour people who work in the arts and her mum works for the V&A so it makes sense. I've been a few times and the vibe is boring and pretentious AFAll influencers, however big or small, seem to be members from what I can see. I bet they have discounts/ free for publicity