I don't know if all the Fox & Hound locations do this promotion, but the Littleton one lets you drop a business card in a bowl for a chance to win free appetizers for a group of up to 20 people, plus free pool for two hours. It's a fantastic deal--they're extremely generous in providing appetizers both with the size of the appetizers and the number of dishes served. If everyone in your group drops another business card, you and your friends/coworkers have good odds of continuing the cycle of winning free appetizers every couple of months.
Pros: nice atmosphere
Cons: not cheap
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