In an early scene in the hotel room outside of Atlantic City, one can see the image of Circus Circus Hotel and Casino outside the window. There is no Circus Circus Hotel Casino in Atlantic City.
After Quinn strips for the group, she has clown makeup visible on her chest indicating Zapka probably motor boated her. However, there is makeup where the nose would be - but he isn't wearing makeup on his nose - he has a foam clown nose.