Absolutely ridiculous. I love Gyros and this place opened close to home - I was stoked! Finally got a chance to try it out and went in to order a Gyro. I walked to the register and said I will take a Gyro sandwich. I was told that I couldn't buy just a sandwich unless I had a coupon (????). I was confused and asked what do you mean - I just want a sandwich. He preceded to tell me that I could not order just a sandwich. I informed him that I didn't want the other stuff and I would just throw them away and I got a deer in the headlights look so I asked for the owners phone number.
I called the owner and he informed me of the same policy. It reminded me of the Jack Nicholson Five Easy Pieces schtick about holding the chicken
Needless to say, I ended up buying a Gyro sandwich (only) at Kyklos at the mall.