We are regulars to both the casino and Silver Sevens Buffet when we visit Las Vegas. With the BOGO coupon that is available in one of the weekly magazines it is a very good deal. We have always been treated well by staff at the buffet. Tonight was different. After driving in from the Boulder Highway area we gave our coupon to the cashier. She noticed that in the small print the coupon had expired even though we had picked up the magazine this week. In the past this has NEVER been a problem as coupons are still available in the same magazine. We asked if they could accept it since we had driven especially for the buffet. We were refused even though we were regular customers. The cashier was friendly but firm. I asked to talk to the manager. He was very rude and said it didn't matter if we were regulars, he would not take the coupon. I told him I would not come back if he would not, he said he would not ALLOW me to come back then!! I asked to talk to another manager. He called the security manager even though I was not yelling or anything!?? I through my players card in the trash with the coupon and said I would not come back and he said if I did not leave right now he would cuff me and call metro to arrest me!!! Now understand that I am 60 years old, was not yelling or even speaking loud! Apparently he was upset that I threw my card in the trash! PLEASE never go to this place again because they do not respect us as customers!