If you are in St. Louis, you should definitely hit
Schlafly's brewpub. They have some very good beers - the pale ale is very well done. If you head down to Laclede's Landing, make sure you hit
Morgan Street Brewery. Later in the night, there will be a massive college crowd move in. Make sure that you go upstairs because they had different beers upstairs than they did downstairs when I was there.
Try the graham cracker porter and let me know what you think. I was very skeptical regarding this beer when I ordered it because I usually have a bad impression of beers with "gimmicky" flavors. This is a very well done porter, IMO, and I really want to duplicate it.
My wife and my mother in law (who will not drink beer unless it is Miller Lite or Blue Moon) even loved it. Very sweet, very smooth . . . and it tasted like graham crackers!