KPO -- Broadcasting Features for Monday! -- June 21, 2022

San Francisco Examiner, 11-June-1922

The original KPO studios were in the Hale Brothers department store at Fifth and Market. Hale Brothers owned the station. In 1929, the station moved to the Hale Brothers annex, seen behind the corner store. In 1927, the station became an early affiliate of the NBC Red Network. NBC acquired KPO in the 1930s and changed the call letters to KNBC. Later, they wanted to use the call sign for a Los Angeles station and changed the San Francisco station to KNBR.

This ad for Hale's Brothers mentions the radio station but not the call letters. The Shriners (Ancient Arabic Order of the Nobles of the Mystic Shrine) were having their annual convention (Imperial Council Session). Imperial Potentate Cutts was the outgoing head of the organization. 

Fanchon and Marco (Wolff) had various companies touring in vaudeville and ran a dance school in Los Angeles. I have never heard the song "Islam Greets You."