I do a boys trip to Vegas each year and we always watch a football game out. Most sports books are not well suited for a dozen guys to watch a ball game together. The sports book setup allows you to talk only with the guy on either side of you. For that reason, I suggest the 777 Brewpub located at Main Street Station. Others have recommended the 777 also, and for good reason. They offer good bar food and beer, cocktails, a nice atmosphere, reasonable prices, and plenty of TV's. Another thought, if traveling with a lady, you might consider upgrading to the Rush Tower at the Golden Nugget.
From one who recently moved to eastern Wisconsin, and I wish my fellow "Cheesehead" a fun and profitable trip.
Have fun.