If you are not an Equity Member, you can still go to an EPA. BUT, and this is very important, you must keep in mind that the primary purpose of the EPA is to cast Equity members. It is up to the Casting Director in charge of each audition as to whether or not they will have time to or have the desire to see non-Equity performers at their EPA. Sometimes they make this decision in advance. If you are interested in trying to be seen, you should go to the audition site and first look for anything posted that says whether or not there is a list for non-Equity, if they are accepting pictures and resumes from non-Equity, or if they are not interested at all. If there is no information posted, wait patiently for the monitor's attention and politely ask if they are planning to see any non-Equity that day. Do NOT argue with the monitor not matter what the answer is. Not only will it get you nowhere for that audition, but they will remember you and it will hurt your chances of being seen in the future. I know how frustrating it can be, but really, swalloing hard, smiling, thanking them for their help, and waiting until you get home to let out that frustration is undoubtably the best choice.