Some say Act IV, others the Back Door on Division St, but it actually began at Que Pasa.  Joe Peters owner and manager initiated the flame that got hotter and hotter until it burst apart.
And, out front from Que Pasa was the Tamale Cart with a large umbrella and Cisco wearing a Sombrero at the corner of Edenborn Ave and 18th (later, changed to Fat City Blvd.)