Jay-Z in his 40/40 nightclub

for many men his age it would be well past their bed time.

But that did not stop Warren Buffet from representing at the reopening of Jay-Z’s 40/40 nightclub in New York - and partying like a man in his 20s.

The billionaire investor, 81, rubbed shoulders with celebrities young enough to be his grandchildren at the star-studded event last night.