When Phil said "Somewhat satisfied" on the phone, this was a call back to the Dude Ranch (S3.E1) episode where Phil said he would only be checking Somewhat satisfied on the comment card.
The people at the country bar that Cam and Mitch go to make fun of Mitch's outfit including his new blue boots. The guy who plays their friend Nate was on several episodes of the show The Good Place and gave the main character Chidi a conundrum by buying him a pair of red cowboy boots like the ones he had just bought.