During the opening scene in the diner when Mike and Carl are discussing Mike's plans to ask Molly out on a second date, Carl's hand keeps switching positions on his coffee mug when the camera is cutting between shots of him and Mike.
While Mike and Molly are supposedly driving through the
streets of Chicago; an L.A. Tan is seen out the back window
of the car.
Molly points out a Coffee Bean & Tea Leaf in Chicago. There are no locations in Chicago.