The name of the comedy club, Chuckle Sandwich, is a 30 Rock reference. S4E3 of 30 Rock has Liz and Jack scouting for a new cast member at the Laugh Factory (during the day, it's the chuckle hut) in Kenneth's hometown of Stone Mountain, GA. Liz eats a chuckle sandwich (according to Kenneth, the "chuckle" is the area between a pig's tail and anus) in Georgia and gets food poisoning.
Another 30 Rock connection in this episode: Riki and Kate's heckler was Liz Lemon's potential Leap Day sugar daddy.