Channel-zapping recently (a rare thing, I usually watch the internets nowadays...), I happen upon the "made with real cheese" special: Weird Science.
The silly bar scene is in play, but Lo And Behold - who do I spy at one of the bar tables, but none other than the esteemed Joyce Mandel... I never knew this.
Pop over to IMDB, it appears she had been an uncredited extra, but was listed in the extended IMDB cast listing.
Learn something new every day...

Cheers,
-D'Artagnian