Reliable Source: This is where all the rich people were on Saturday night

If your friendly neighborhood billionaire went missing this weekend, don't fret. He or she is safe. Well, not counting the hangover.On Saturday, the establishment descended upon Washington for the 103rd annual Alfalfa Club banquet. The uber-exclusive night of hobnobbing at the Capital Hilton is a chance for "Wall Street billionaires and Washington's insiders to good-naturedly turn the tables on the outsiders who have been going after them," as one source in the rarefied room told us.