We attended IMATS today at the Pasadena Convention Center. We parked at Paseo Coronado which is very close. The was a uniformed person collecting $9.00 in cash for Event Parking. We had been there yesterday and took a ticket and paid afterwards, therefore I questioned this action. There was a Sign "Event Parking" added to the sign that was there. We paid. The tickets didn't let us out when we left, we had to pay the machine addition funds to exit. Of course, the perpetrator was gone and there was no number to call. WE WERE SCAMMED!!! I called the Pasadena Police to let them know that they should monitor this SCAM in their city. They told me that it was a private parking structure and was not their concern!! I thought stealing from people was a crime. My error. PEOPLE VISITING PASADENA: BEWARE!!!