You wake up with everyone

From Rumblepedia

After you assisted to a wild and wacky party at the Khazan Grounds, you wake up the next morning nude, with a horrible hangover, fuzzy memories of what happened, and in the middle of a huge room full of sleeping, naked people. Everyone from the Negima cast to Spider-Man's villains to the Endless to Superdick to the Street Fighters to the Seinfeld cast to everyone in between is there. Looks like the party went a wee bit too wild.

The door is open at the other side of the room. But you have to walk to it around the sleeping masses to get to it.

t4F7af Heartfelt thanks..!