On July 7 th ( Thursday), Top crewmen in Muni will compete in the Annual Cable   Car Bell Ringing Contest at Union Square.   It is a great SF Tradition and the best of SFMTA`s professional Bell-Ringers will   compete and the winner will get the Title “Bell Ringing World Champion”.   Event is Free and Open to Public.   Don’t Miss it   Image courtesy of SFFunCheap