Joey's intervention took place almost entirely over text messages, because he ran out of the hotel conference room where his family had been waiting with Ken Seeley, and would only communicate with them via text while at his friend Pizza's house. Pizza is Joey's drug buddy. When I first saw his name in the subtitles, I imagined him as a white guy in his early 20s who's maybe into reggae and wears dirty hippie junkie knit hats that look like giant old hacky sacks, and probably earned his nickname during the gateway phase of his current downward spiral, because he'd always be the first one in the room to get the munchies and suggest calling Domino's.
But it turns out he's a portly, creepy, middle-aged man with an injured nose, who probably earned his nickname from working in a pizza parlor.
He ended up being a central figure in this episode.
Pizza swore that Joey was not hiding in his house.
So it's OK, because it all worked out in the end. Joey is trying to learn the true meaning of "serenity" in rehab, but judging from his recent artwork, it seems like he's not quite there yet.