I watched this movie again this morning and came to the conclusion

I agree. That scene is every bit as uproariously funny as the Meg Ryan
scene in When Harry met Sally, and deserves to be just as well known,
quoted and beloved. But nobody knows what I'm talking about when I
mention it! It drives me crazy.

You know, there have been film compilations called,"That's entertainment"
and "That's Dancing". But there really needs to be one called,"That's
Funny!" to highlight all of these undiscovered little gems.

I love how upset Kline gets by his sloppy-looking untucked shirt,
and then how he tries to keep still with his face all scrunched up in frustration, visibily pulsating to the music until he finally
explodes into that frenziedly joyous dancing all over his house,
while the voice on the tape bellows,"Kick someone! Punch someone!"

And earlier,"Real men do not dance; they drink, they work, they
have bad backs, they DO NOT DANCE. Hold still...whatever you do...
do not dance."

I'm so glad Kevin ignored him! *Insert grinning smiley here*

The scene is amusing and fun. but I think it damages the overall dynamic of the film. The interactive cassette echoes "Jefferey" and "La Cage aux Folles" for me and seems a bit of a filler.