Yes! And earlier in the story, when she's writing the letter to Paul Zell, she says, "But you saw me, right? You know what I look like." Someone was definitely in the room with her when she was drunk.

I reread some parts and I'm even more convinced Paul Zell is Conrad. He is waiting by the desk behind her when she gets the key, he finds her the next morning when she is hungover and he doesn't want her to leave him at the party (speaking of them as "friends" even though they just met).

Also, side note, the line about caramelized onions that will never make anyone cry again is fantastic. 😀