Assuming that's Brown at the dais in the centre of the shot, then yes, he's probably at the front of the crowd with a mirror behind him at the right. Even doubled, that doesn't look much like 500 people to me.
Here's another shot of Brown (from @DougFord2014).
For that kind of money, I'd expect more than a buffet. And here's a link to the entire set-up.
https://twitter.com/DougFord2014/status/616012144144961536
Quick, someone count the tables!
I got 17 (two times), which coincidentally is the number assigned to the right-most table in this clip. Assume all the tables were full, that's 170 people, including the Fords and their special quests.