The postcards on this page advertise the Heidelberg Inn, a German restaurant / beerhall ("Alt-Deutsche Bierstube") at Market/Ellis/Stockton (35-37 Ellis). Crocker-Langley city directories from 1908 through 1917 list the Heidelberg Inn, but due to WW1 anti-German sentiment it was renamed as the Columbia Inn in 1918.
The first three cards above show almost identical scenes from Meyer-Förster's extremely popular play Old Heidelberg, each with a quote from the play in German. These cards predate the many film versions of the play.
Each of these cards references "Jewel City—1915", i.e., the P.P.I.E. The captions at bottom are in German dialect.
Steve's SF postcard pages: