A Picture Lasts Forever. A Beer Lasts 15 Minutes.
Krakow is one of those cities that makes you wish you could go through university twice. It is said that the onslaught of students at the start of the semester is enough to push Krakow past Lodz as Poland's second largest city. This can only mean one thing, because wherever there are students, beer and beer-serving establishments are not far behind.
There is no point mincing words: go to Krakow for the pubs and bars. Sure, the city has spectacular medieval architecture and a classic old square. That's what your camera is for. The focus of your time should be spend sampling the finest brew the micro-breweries have to offer and feasting on traditional Polish culinary goodness. I think Jenny would agree.
Arrive in the wintertime if you don't mind the cold. Darkness falls at about 4pm, so the socially acceptable drinking hour is much earlier than you are probably used to. If all you can manage is the summer, no problem. The entire old old city square is flooded with tables and chairs, as the pubs spill forth from their walls. It may just be worth a trip back for this reason.