Newt - I'm not sure that your assumption that 'younger' members are not interested in the club is correct . I portune that it is quite the opposite - when I was in London until 18 months ago, the club alsways seemed to have a lot of JOs using the facilities (generally only the rooms, to be fair) - as I did 20-odd years ago.
Additionally, there are many reunions, farewells and get-togethers held at the club (and very good they are too). But they are not cheap to attend and some orgnaisiers might feel it is inappropriate that ex-Non-commissioned personnel attend, or indeed might think that they will feel uncomfortable (on both counts I would disagree with this premise).
In due course I will be a retired member and although this cohort may help with modest cash-flow through subscriptions, but are less likely to be using rooms on a regular basis and spending up large in the Running Horse. I agree that the opening hours of that bar need to be expanded, inter alia