Chris, thanks for asking for feedback. I think you did a great job.
That being said some of the things I noticed where that the drinks in Rain were double what they were at the round bar. If you are going to keep the show floor there, how about making the drinks cheaper at Rain than the other bars? Might make it a little more appealing.
What would the possibility be to buy out the round bar every day during set times for networking happy hours? Most of us did our business there anyway and this way people would need badges to get in.
Lower the price of badges.
Although I did manage to make it to the 9am Speed Networking with no hangover, I do agree that starting things a bit later would make for a better crowd.