I know Ian Levine said he didn't want to be part of it unless it was actually at the Mecca which, of course, is impossible. I'm also aware of Les Cokell's demise and the sad state of Tony Jebb's health.
I'm not really in favour of trying to recapture anything from the past as it's an impossible task. Anniversaries are fine if the club is still open (i.e. the 100 Club) but rather pointless if it has been shut and subsequently demolished for over 30 years. Also dressing up like you did 40 years ago when you're in your 50s or 60s is also rather sad. I remember laughing at the Teds when they had their revival in the mid 70s and they were only dressing up like they did 20 years before!