I live fairly close by to this Duffy's and although I don't normally frequent a restaurant chain/sports bar this is is worth a visit for a relaxed evening.
The menu has plenty of choice, there is happy hour all day, every day so 2 for 1 on all drinks. The food is not upmarket and there are TVs everywhere so if you are looking for a quiet night, this may not be for you. However, the food is always nice, the place is family friendly but equally if you are looking for a night with friends, there is plenty of seating and they tend to put families near each other.
The servers are normally friendly (with a couple of exceptions) and the food is always tasty (I have been here quite a few times and only occasionally thought the food was overcooked).
Make sure you sign up for the MVP card as you can get points towards a meal.
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