Of course, Michael’s stint as a bartender on The Good Place doesn’t have to be the only place it can reference Cheers.
The show has been creative enough throughout its run that there’s no shortage of scenarios that could include a cameo by Rhea Perlman, Shelley Long, or even Kelsey Grammar.
If Dr. Frasier Crane somehow ended up being a colleague of Chidi and the two frequently traded philosophical emails that would be amazing!
Former cast members of the show could always appear as immortal beings in the Good or Bad Place, or as actual people in the real world as the series continues.