Reliable Source: Everyone wants to be a little Irish at the 'Once' pre-show reception. Just ask 'David O'Rubenstein'

Everyone wants to be a little bit Irish at Wednesday night's "Once" pre-show reception at the John F. Kennedy Center for the Performing Arts."I keep forgetting to wear my green," said Kennedy Center Director Deborah F. Rutter. Billionaire philanthropist David Rubenstein joked that his real name was David O'Rubenstein (Something about the O'Rubensteins being a lost tribe in Israel ...) before cheers-ing to the $20 million dollar gift the Kennedy Center received that day from Boeing Chairman W. Ja...