Gizmo Brew Works is pretty new, right on Franklin St. Can't say I have been there, but another decent pair of options are He's Not Here, about two blocks away, as well as Pantana Bob's. Younger crowd, but good outdoor seating, and I can attest it is much more college authentic. Gizmo sort of looks like the old Library, just newer.
Also, on Friday, I would check out The Carolina Inn, as they typically have live music and drinks. It is called Fridays on The Porch.
After the game, the more sophisticated should check out The Crunkleton, a members only drink place where 10 bucks gets you in, but great mixologist and a great selection of bourbon.
I will be in Chapel Hill for this one. Native Minnesotan and long-time sufferer of Gophers football. Went out of state for school, to include UNC, so this weekend i will be in Carolina blue, though it was a difficult decision. Next year, I will be back home and supporting the home Maroon and Gold.
Thanks for having me, and if you have any other questions, I can try to assist. Haven't been back to CH in about 5 years, but I try to stay abreast of what restaurant bars are doing.