Guest star Ernie Sabella (Coach's Bar Patron in the "guessing game") went on to play Carla's cousin in the next season of Cheers (1982) - #4.8 Love Thy Neighbor (1985).
There are many myths in popular culture, like Cliff's anecdote, regarding the origin of the necktie. The consensus among historians is that the necktie has always been a matter of fashion and never served a practical purpose.
In the cold open, Coach asks a bar patron what year he was born. He gets the response of 1949 - the actual year of birth for the actor playing the patron, Ernie Sabella.