The 8-pointed Star of Ishtar features prominently at the dance. Ishtar was the Mesopotamian goddess of sex and fertility.
The toilet diving scene is a reference to Trainspotting (1996).
When Andrew and Nick are fighting in the hallway and Maury rolls up his sleeve, you can see a tattoo on his forearm that says "Connie". Connie is the female hormone monster who makes her first appearance in the next episode.
During the sleepover, you can see the video game "Hooker Killer" on Nick's shelf.