Yes, it's a "theme" restaurant, but in my opinion the only thing that may appear theme-ish is the fact that they serve deep dish pizza, (which is quite tasty, by the way).
I do not like beer, but for those who do enjoy the frosty beverage, they have several local and on-site drafts on tap. My boyfriend really enjoys their summer ale at the moment.
They have a fairly extensive menu, which ranges from gourmet pizzas to pot roast to standard bar fare. The food is definitely good, but some items are a little on the expensive side. For example, a large chicken caesar salad will set you back $12 (it's decently portioned, but it's still chopped lettuce with some chicken). Conversely, the chicken parmigiana, which is absolutely delicious, is $12.99; but any average eater could easily get two meals out of it.
The staff is nice and fairly attentive, but sometimes the service is a little slow, depending on if you sit in the bar or not and the time of day.
I'd definitely recommend, but know you're probably going to throw down about $20 to get the full Chicago experience.