I only have a dim memory of this building from my childhood; as I recall, it was ramshackle by that time.
However, in its day, the Trading Post had been important. In April 1927, an article in the Los Angeles Times described an auto tour of the Coachella Valley to see the wild flowers and included a reference to a “fine new swimming pool” at the Coachella Valley Trading Post.
In his reminiscences to Katherine Ainsworth (The Man Who Captured Sunshine, 1978), artist John Hilton told her of picking up some good hints from Charles Safford, a graduate of the Chicago Institute of Art. “Stafford [sic]* lived and worked at the old Coachella Trading Post. He and I decorated the walls with our scenes. We were mighty proud of those pictures, but during World War II, the place became a U.S.O. center and the soldiers used our painting as dart boards.” (Ainsworth , page 99).

I remember seeing a photograph of soldiers posed on the front porch of the Trading Post. During World War II, there were US newspaper articles, across the country, that Mrs. Edward. G. Robinson had organized bus trips for girls from Beverly Hills to travel to the Trading Post to dance with the service men; it cost them $5 and they had to take an oath not to drink alcohol or to leave the premises of the Trading Post during the visit. These trips were even made in August when approximately 2500 Army men would come to dance with the 200 girls, who slept on army cots after the dance; on Sunday they went swimming in the pool before returning to L.A. At least one soldier is reported to have jumped in the pool fully clothed!
I hope to find more history of the building; if you have anything to add, please let me know; thanks.
- Should be Charles Safford.