apparently, 1307 31st Avenue (near International Blvd.).
Google street view shows wood furniture and sculpture in the (closed) front metal roll-up entranceways.
100% silk and golden donna facebook entries do not appear to show any information relevant to the rave.
This video gives a flavor of the neighborhood (slow down, clyde carson ft. the team):
https://www.youtube.com/watch?v=fJdqw-JzW08
Also did you notice that the windows on the second floor are covered with a steel mesh. The second floor is where they found the bodies. Who knows if that steel mesh was not there perhaps there would have been a chance for them to jump out of those windows. That mesh prevented anyone breaking the windows from the outside or inside. That place no doubt was a big fire hazard.