There is a small museum on the top floor that details the history of the building and a small observation deck IF the weather is pleasant. If you are into architecture it is worth a few minutes and entry is free for guests. We prefer the Prohibtion Bar on the 27th floor to the Living Room, decent happy hour and generally less crowded but still lively. Lots of restaurants nearby, if you are a carnivore (or like Bourbon) try the Butcher and the Boar on Hennepin.
Cheers