During the 1960s Hippie movement, a large amount of the rock and roll poster art was strongly influenced by the Art Nouveau period of the early 1900s.
A poster for an appearance by The Doors at San Francisco’s Cow Palace Exposition Center (presented by Fillmore East and West owner Bill Graham) featured some wonderfully eclectic Nouveau-styled serif hand lettering.
Now recreated as a digital type face called Cow Palace JNL (and named for the performance venue), the font is available in both regular and oblique versions.