HaHa! Armour Star 1951 add;
when "GAYER" still meant happier. Otherwise, it was a fellow "family member" advertising wtiers way of expressing it secretly.
That way, other fellow "family" who knew them could reach out for friendship, etc. and refer those they already knew about.
Everything had to be on the "down low" so I'm sure it happened that way, especially in New York city for example.
When I was age 20 in 1980, I actually loked up "GAY" in the white pages phone book because I din't know where to go to meet others. I didn't know where any gay bars were. There was one listing in Detroit. The name in the book said Gay Council, so I called it, and it turned out they were at a local university, and very hellpfull.