Frankly, I can't see the point of spending any more time in London than you absolutely have to, so perhaps my RAF Club membership was shaky from the word go. However, I have to echo others who say that it's extremely difficult to get a room if you're not in the clique of ex-Air Officer regulars who seem(ed) to monopolise the place, and, if accommodation is all you're after, there are nicer places to stay with better availability without paying too much more.
I'm not one of those who has friends that get married/re-married/buried in 'town', I'm not a retired senior officer, and my job doesn't require me to ever visit central London, so I couldn't see the point of continuing my membership and finally got around to cancelling the DD this year.. I was a member for about 33 years, stayed there once, visited maybe 10 times. Nice place; I hope it continues in some form or other.