try to secure tickets before you get here. check out ebay, stubhub, and the cubs.com site for people selling their own tickets. failing that, there are lots of places near the stadium or a bit south on Clark St that will sell tickets gameday, but its not like you have much of a chance to shop around then.
any of the surrounding bars will be a good time. Murphy's is the most popular. it is on the corner across from CF.