OK, the East Village is officially over: now the Bidens are hanging out there. On Saturday night the Second Family held a surprise 40th birthday party for Kathleen Biden, wife of Joe Biden’s youngest son Hunter, at the Elephant on East 1st Street. The Thai joint’s Adria Jover Sala tells us the Bidens brought 40 guests and a full complement of security, including rooftop snipers, and had a lovely time dining and dancing till 2 am. Here’s the Vice President Elect and some Elephant guys. Next week, Max Fish and maybe a movie at the Sunshine. Ha! We remember when political dynasties came to New York to do heroin.