Airplanes used to get you to pull into gas stations or restaurants, the Best one first, Bobs Air Mail Service on Wilshire Blvd in Los Angeles, circa 1938

as you might read on the tail area, it was labeled the "Happy Landing" and sold Mobil gasoline

Above 2 photos from http://forum.skyscraperpage.com/showpost.php?p=5679313&postcount=7493

Below images from the guru of the Roadside attraction and signs: https://roadsidenut.wordpress.com/

The above is the only photo in this post from http://fifties50s.blogspot.com and the airplane over Evans Service Station does not appear on any Google search, or other websites that I could dig up when looking for more cool old airplanes and warbirds for this post

the two images above are from http://www.pprune.org/aviation-history-nostalgia/485451-airplanes-billboards-hotels-gas-stations-etc.html