I went on a Wrigley field tour and had a great time. I'm not a huge sports fan but I enjoyed seeing the places one would not otherwise be able to see, my fiance is a huge sports (& Cubs) fan and enjoyed the tour and even learned a few pieces of trivia along the way. We checked out the press box, field boxes, away clubhouse, Cubs clubhouse, bleachers and dugout. The volunteer tour guides were very knowledgeable and friendly. And it's good to know that the entire ticket price (only $20) goes to the Cubs care charity that keeps kids sports teams in equipment, among other things.
Even if you're not a tourist or a die hard sports fan, I recommend this tour.