movie about finding a golden city where villain uses snake venom

Stowing away after a failed con, a pair of swindlers end up on El Dorado, the fabled "city of gold", where they quickly get in over their heads when they are mistaken as gods by the inhabitants.

A black comedy about excessive consumption. A young couple are determined to make a break with a predictable future as servants of a large corporation and sink their savings into a restaurant. All is disaster until the appearance of the Porters, whose enthusiastic patronage soon has trade booming.