Elaine tells someone at the party that she is reading manuscripts for Pendant Publishing. Jerry walks by and says "Pendant! Those bastards!". This is a reference to what Elaine's father said in "The Jacket" when Elaine told him she was working for Pendant.
In another reference to that episode, Kramer tells Steve a story that involves a magician and someone almost getting hit by a car. Although we don't here the entire story Kramer's probably telling Steve about when he and Elaine picked up his friend's doves.