You felt unwelcome. That's horrible service, no matter the reason!
It's quite possible that they give excellent service when the customer is not using a coupon. But I'm guessing you'll never know because of how they treated you. Even if you aren't their target market (because of the cost and driving distance, etc) it's possible that you would take someone there for a business deal or date because you remembered how nice it was. (Nevermind the outside.)
They defeated the whole point of groupon: To attract new customers.
It's quite possible that they give excellent service when the customer is not using a coupon. But I'm guessing you'll never know because of how they treated you. Even if you aren't their target market (because of the cost and driving distance, etc) it's possible that you would take someone there for a business deal or date because you remembered how nice it was. (Nevermind the outside.)
They defeated the whole point of groupon: To attract new customers.
Instead, they are actively pushing them away.