WHCD 2013: Rachel Maddow Bartending
This explains it.
As we've been watching people come in and find their seats and rub shoulders with the scant number of politicians, one question has been flying around: are there more celebrities in attendance than journalists?
Well as can be seen in this photo, maybe all the journalists have been put to work in service positions. Rachel Maddow is well-known for her drink-mixing skills so maybe they put Bill O'Reilly on security detail - given how tall he is he could spot Tracy Morgan trying to undress any where.
Scope around the crowd, but maybe the actual White House correspondents are right now in the kitchen preparing the meals.