One bar I always visited when I was studying, is Miller Time.
You can drink, dance and chat with good music in a nice surrounding and relaxed atmosphere. The bar's gem is the huge and hidden back terrace, with big trees in the courtyard and a stunning view on the Grote Kerk.
Dress Code Casual is good enough.
Café Miller Time
Though many Dutch people don't even know the American beer brand Miller, there are a couple of bars in the Netherlands that are called after this beer. This one in Breda is one of them. I like this bar because of the relaxed atmosphere and most of my friends went here regularly. Together with a dozen of classmates I even held my college graduation party in the Miller Time. It was great!
The Miller has a great garden in the back. Very nice on hot summer nights...