The Al's Bar listing for the week of August 13, 1993 says this for Saturday:
"Greenmen, mind-twisting troubadour Beck, plus Burning Sofa Number 10"
Haven't been able to find any concrete info about who Greenmen are for sure (there's a few different bands it could possibly be). Burning Sofa No. 10 were a local Silverlake band, who also recorded at Poop Alley (as did Beck a bit).