I watched the Northwestern game at Cap City Tavern near the capitol building in Denver. It was a good time, and you can call in advance to reserve a table. There are other Husker bars in the Denver suburbs.
We've been to Fox & Hound for games several times. Packed with Husker fans. Probably be there Saturday.
Giggling Grizzly in LoDo is a Huskers/Sparty bar. Haven't watched a game there, but we had fun watching two guys fight each other in the rain one day.
The Fox & Hound on Arapahoe used to be my fav but they closed it. I heard Fox & Hound by Park Meadows is cool.