Table of four at night, we order 2 appetizers and ...

Table of four at night, we order 2 appetizers and three meals. At the beginning we told the server we have a groupon for $40 of food. We are told we can't use it unless we buy 4 entrees. We say ok, we agree maybe we should check the fine print. Our food is delivered. We had to ask for eating utensils because ours wasn't provided when we sat down.The food is good. During dinner, we read every word on the groupon. It has conditions on there about when you can use it. It doesn't say you have to make certain types of food purchases. We ask for the manager so we can clarify. The manager argues that the groupon won't be applied because the word dinner is used on the groupon, and due to the definition of the word dinner we are to know that means the cost of appetizers aren't included. If it said entrees must be ordered on the coupon then magically we would have known. It didn't. We used the coupon because we were in the right. The manager could have easily turned the bad situation into making it right, but didn't. We aren't going back. Hope this helps make your decision.