The 'South Park' creators face another spat with Casa Bonita staff just weeks after they abolished tipping at their restaurant

• The "South Park" creators face a new dispute with staff at their restaurant in Colorado.
• Casa Bonita employees say they aren't working the 40 hours a week promised when they joined.
• They previously complained when the owners abolished tipping in place of a $30 hourly wage.

The creators of "South Park" are facing new unrest from workers at their Casa Bonita restaurant a month after they came under fire for abolishing tipping.

Staff at the restaurant in Lakewood, Colorado sent a letter to Trey Parker and Matt Stone, the owners, and managers on July 12 outlining a list of demands and gave them a week to respond.