Its been a few years since I worked out in Poland but there used to be a bar at the bottom end (Church side) of the square called 'Bastille' with ann odd prison decor.
Can Highly reccommend Wisniowka Vodka, its cherry flavoured and drinkable neat
edit:
You could do worse than a trip to Zakopane in the south, its a beautiful ski resort and popular destination for Polish folk. looks like a swiss village what with all the log cabins.
Great cable-car ride to the top of the Tatra mountains, you can see all the way across to Slovakia, spectacular!