Tonight it's a congressional picnic luau for members of Congress and their families. Events, according to Politico, include a dunking tank (see Rahm and Orszag get dunked here and Gibbs get dunked in slow mo here), hula lessons and dancing to Hawaiian music, Beach Boys and Elvis.
Before tonight's luau, Michelle and Obama pitch volunteering. They worked at the food bank this morning:
Watch Michelle Obama sort of hula: