Besides the fact you weren’t cool, famous or wealthy enough to attend.

From Flavorwire:

10. Off the Heezy, Fa Sheezy. As after parties go, this one was was particularly epic. Held on the crystalline roof-deck of the Cooper Square Hotel, the intimate gathering featured a (dangerously) open bar, and, for no apparent reason, an open-air bath tub. Björk kicked up the party with an unexpectedly ruckus DJ set featuring Bell Biv Devoe’s “Poison” and Amerie’s “Got Me Trippin’.” Members of Dirty Projectors, St. Vincent, and Vampire Weekend, meanwhile, could be seen waiting in line for the can.

Read the full list here.

Something else you might not have known is that Olaf Arnalds also performed.