Remy greets Nick and Winston as "Coach" and "Brad". Brad is Damon Wayans Jr's character name on Happy Endings (2011).
The mural of the "sexually-charged zero-G tea ceremony" in the closet, which is signed by a "Gian Carlo" whom Schmidt also identifies as the painter, is in real life entitled "Digital Space Girl". It was actually created by Los Angeles-based artist David Larks, who also produced many T-shirts, book covers, paintings and murals for the show.
Jeff Kober (Remy) and Gillian Vegman (Kim) have both guest starred on Supernatural (2005). Kober was in season 2 episode 19, Folsom Prison Blues, and Vegman was in season 10 episode 6, Ask Jeeves.