(Bear with me if I get any of this wrong, including casting. I only saw it once and that was nearly thirty years ago.)
Young married couple A (Bill Murray and Gilda Radner) have enjoyed a dull but pleasant evening on the town with young married couple B, (Harry Shearer and Larraine Newman) who are their new neighbors. They're back in couple A's apartment making awkward small talk over coffee but it is clear the two couples don't have much in common and they are winding down an evening they are not likely to repeat. Casually, couple B notice a souvenir ashtray with a Vegas hotel logo: they've stayed there too. Couple A mention they saw comedian Joey Bishop perform there recently. Couple B brighten noticeably: they're big fans of Joey Bishop. Couple A warm up in kind; they're big Joey Bishop fans too. They confess they don't just like Joey Bishop, they love him! Same with couple B--they worship him! Within a few exchanges it turns out they are clearly the four most Joey Bishop-obsessed human beings on earth. They are trading movie quotes, stand-up routines, even singing the theme tune from Bishop's short-lived sitcom. One of the husbands does a verbatim impression of Guy Marks, Bishop's erstwhile sidekick. No detail of Joey Bishop's career is too obscure or trivial for these four not to cherish. The two couples are now deeply bonding and the atmosphere has gone from tepid to frenzied mutual joy. They pledge to see his next live tour together and appear to be starting a long, beautiful friendship.
Catching their breath for a beat, couple B ask if couple A saw Bishop's most recent appearance and Couple A confirm they were there the same night. Did they see the late show or the early show? Both shows, say couple A, of course! Couple B admit they saw both shows too, they only asked because they thought Bishop gave a better performance in the late show. The mood suddenly chills: what do they mean, couple A wonder? Couple B reiterate that they thought the late show was superior and they felt Joey Bishop was generally sharper and more warmed up during the late shows. Frosty now: couple A go on the defensive: Joey Bishop is a professional, the consummate entertainer, he never goes on without being warmed up; he's always sharp! Couple B won't relent: for technical reasons that are no fault of his own, Joey Bishop is at his best in his late shows, period. Not so, couple A insist; he's never ever not at his best! Now there's a chasm of difference between them and the evening dissolves very quickly: excuses are made, coats are grabbed and couple B hurry home, permanently alienated from couple A. Couple A are non-plussed and shake off the bad mood by deciding to watch an old videotape of one of Joey Bishop's shows.
I bring this up because some of the comments regarding this flap involving my observations about Chuck Jones remind me of this skit: how details in the devotion to a particular figure (even someone as low-key as Joey Bishop) can become a source of contention that creates a schism between groups who fundamentally feel the same way, but not fundamentally enough to suit all parties. It somehow never ceases to amaze me.