On the page showing all the locations in a state (The State Page) there is a filter at the top of the INFO BOX called "NON-CASINOS?". The options are:

YES - Show Non-Casinos (Shows both Casinos and Non-Casinos)
NO - Do not show Non-Casinos (Shows only Casinos)
ONLY - Only show Non-Casinos (Shows only Non-Casinos)

To filter out Non-Casinos select option "NO". While most collectors do not collect Harley-Davidson chips, there are many that do. The ChipGuide wants to be INCLUSIVE to all collectors, which is why the Non-Casino filtering option was created.