According to this annotated aerial, it was on Temple at Bunker Hill Avenue... built by the Federation of Jewish Welfare Organizations in 1915 (apparently remodeled in 1933).

Water & Power
This view of a bit of the east end of the building is from the LAPL with this caption:
"Looking southwest across the intersection of Temple Street (foreground) and N. Grand Avenue (left) towards the Cadena Hotel located at 600 Temple Street; Cadena's Market occupies the ground floor. On the far right is the Art Deco style building at 610-614 Temple Street occupied by the offices for the Federation of Jewish Welfare Organizations, and on the far left, a portion of the former St. Angelo Hotel is visible. All of these structures have been demolished."