A few of you have written to inform me about recent difficulties paying for the November event through the Meetup website. ?Thank you very much for being in touch and informing me of the problem; I've notified Meetup of it, and hopefully they'll fix it.
In the mean time, you can easily bypass this temporary problem by going directly to www.payments.amazon.com
and buying your ticket there. The email to send your payment to is: [address removed]
Sorry about the inconvenience and thanks!