Blimey, so its cheaper to get in as a member of the public using the Groupon voucher than it is for the club members attending who are helping to be part of the event?
It might be worth everyone on the list confirming they still plan to attend before people pay for tickets, as the list on here is quite old and people may have changed their minds.
I would rather that than a few people pay only to find there's only a handful still planning on going.... ?