Even leaving aside maneating elves... there's plenty of satyrs and other fae in attendance, and their reputation does not really lend itself towards moderation in their excesses.
That together with the blue left hand tattoo below a sun with lidded eyes. I suspect Ozzie to be the invited sacrifice that will protect the wayatl from the infinite night. Could be that Huītzilōpōchtli has nothing to do with this and Ozzie will have an enjoyable party?
My crystal ball is foggy, but let's see... I think Ozzi overdoes it and misses his group's next foray into Marblegate. He teams up with Colleen and the late-rising Randulf instead. He also wakes up wondering why he has fleas and his mouth tastes like goat.
A good time to visit the dungeon :)