What!! They're actually allowing people to have fun!?!

Few jars perhaps? Not being tied too tightly to a time would be better for some, myself included.
Re: location:
The Excel Centre is a pain to get to unless you're actually going there! Is there any chance of meeting somewhere a little easier for non-attendees and still in that direction? Perhaps near Liverpool Street/Bank/Tower Bridge (Tower Hill on Tube map)? Just an idea - not really an issue if no one's coming from elsewhere!