In the scene at the bar, two girls are seen wearing BYU shirts. This was because BYU won a competition among different universities to get a shout-out on Psych. Ironically, BYU students are required to follow an honor code that prohibits drinking alcohol.
When Lassiter is in Jerry's room you can see he's wearing his "casual gentleman shoes", like he call them in Lassie Did a Bad, Bad Thing (2009)
In the resort scene where Shawn produces his ID, the picture in his ID is a direct reference to the TV-series 'My Name Is Earl'. Shawn's facial expression has the unfocused, half-awake look that Earl Hickey always has whenever his face photographed.
Clive and Barbie are in room 237, like the cursed room from The Shining. Shawn mentioned The Shining early in the episode.
"Barbie and Clive" are named after famous outlaws "Bonnie and Clyde".