There was an Oirish bar in the marketplace next to the town hall. Was actually ok when we watched the Lions tour game there. You're biggest problem is going to be the 6 Nations on at the same time.
It's admittedly very vague advice, but if you head to the Aldstadt then I'm sure there will be somewhere showing it.
Now then, I have the same question but for Bremen, if anyone has any local knowledge ?