From his annual end of summer yacht soirée to his seasonal favorite holiday party, Jon Harari is never without a reason to celebrate. And this year, for his fortieth birthday? Well, the consummate host obviously had to go all out!

Over 500 guests attended Harari's birthday bash this past weekend. Dressed in their most stylish Fashion Week attire, the party-goers danced long into the night at LAVO.

Curious what you missed?

Click through for an inside look at the festive affair!

[Photos by Travis Keyes]