I catch an episode now and then on Antenna TV. This episode did have some funny moments like Woodman dancing - and the old guy dances pretty well. Makes me wonder how many takes they did to that scene as you have to think the cast cracked up with old Woody doing the jive.
Anyway, the main plot is the Sadie Hawkins day theme of girls asking guys out to a dance and Barbarino being his usual stuck up self thinking he's all that when in reality how many girls actually thought a guy like Barbarino was hot? Seriously Barbarino was not as hot as he thought he was and in reality most girls I would think would be turned off by that macho Italian crap of the 70's. I always hated italians being portrayed as ghetto "im gonna bust you upside the head" gangster thugs. Everyone ends up getting asked out except Barbarino , even annoying Horshack when Barbarino blows off a girl who is actually trying to ask him out,she asks out Horshack afterwards(probably more out of spite at Barbarino who gets to watch her and Horshack walk away together) .
Another shy pretty girl asks Barbarino out the day before the dance and he lies and tells her that he already has a date. Kotter tries hard to tell Vinnie like it is but he still doesn't get the fact that he's a jerk with this idea that it would look bad for him to get date at the last minute. So he goes alone after Kotter prods him to go. What I didn't like was at the end Barbarino ends up with a girl who also didn't have a date as well -she was a rather loud mouthed type whom the other sweathogs avoided earlier in the episode. It would have been better had Barbarino ended up alone and learned some humility instead of him dancing with a girl who probably liked him when he didn't like her.