Downtown San Diego Caliente Sign

Caliente in Old MexicoI see this sign every morning when I walk from the coaster station to work.  This sign is at 6th and C.  I tried a few Google searches but I can’t find any info about it.  It reads “Racing every Saturday & Sunday.  Caliente in Old Mexico.  Home of the fabulous 5-10.  Betting Daily on Major U.S. Horse Tracks.”