This is the main show described in a 1994 SPIN article. Black Fag, featuring Beck's mom Bibbe on guitar, was headlining.
The article refers to it as the second live performance by Beck's new touring band (about to hit the road for awhile behind Mellow Gold). It indicates that he hit the stage alone, announcing a "freakout from 1896" called "One Foot in the Grave." After that, the band joins him (who apparently call themselves After School Special).
Beck also announces a "crazy little Gary Numan freakout called 'New Wave Cocksuckers'" (not actually a Numan cover, btw), which the article describes as an "indecipherable high-speed thrash." It also describes their playing "Teenage Wastebasket," a song which wouldn't surface until One Foot Deluxe 20 years later.