There have naturally been dozens of posts about the Garden of Allah (née the Garden of Alla). But before there was the West Hollywood incarnation--there seems to have been a couple of others. On Sept 4, 1921, the Times ran a item about an elaborate "novel café" by that name to be built on Western Avenue between Marathon and Melrose, pic & article below.... I didn't dig into whether it ever got built. But my big question has to do with the
Garden of Allah Hotel that occupied the Hook-Holliday house at
1386 W Adams at the sec corner of Vermont from 1921 or so until 1926--the year Alla Nazimova began putting together her G of Alla, which had its opening in Jan 1927. The Adams Street G of A became the Adams Hotel for a few years before the house was demolished by Cecil B. De Mille--he bought the corner as an investment and built a very good-looking store building on the site that lasted until 1985 (see below).
Dinner for 100 of your closest friends at Romanoffs or Perinos and a lifetime pass to Mocambo if anyone can find an image of the house that traction magnate William S. Hook and his wife Mary built at 1386 W Adams 1900-02. Locke & Munsell (predecessor of Hudson & Munsell) may have been the architects. It wasn't a small or inconspicuous house--but I've looked high and low for something, anything, photo, drawing, but no luck.
HossC?
Flyingwedge?
The Hook-Hollidayhouse/Garden of Allah Hotel is on the lower right corner near center image from 1928):

UCSB aerials
The De Mille store building sec Adams & Vermont January 1932:

USCDL
Times, Sept 4, 1921 re the possible Western Ave G of A: