In the opening montage about Gunther and where he might live, a map shows a town in Austria called Graz. This is in fact the town where Arnold Schwarzenegger's grew up.
At approximately 29 minutes in, the team is gathered in the hotel room and Blake (Taran Killiam) gets the group going by saying "Alright, alright, alright! That's what I'm talking about" which is a line from the musical Hamilton that leads into the song Satisfied. Killiam did a stint as King George III in Hamilton from mid January to mid April 2017.