Travel / Help, advice and please quash or confirm a rumour about Cracow! [16]

We're a group of 40 somethings flying to Cracow in may for a stag do,before anyone gets on their high horse we're out for a good weekend,we're not rowdy rabble rousers,we just want to sample a different culture.

Just a few questions if you could answer them,we want to see as much culture as possible in the five days we're there.We've pencilled in Auschwitz for one day but could do with pointing in the right direction regarding other sights,museums etc.

We also want to avoid the Brits abroad type pubs,so any info on smaller local bars with a good feel to them would be good.

Also on some forums there have been horror stories of people entering nightclubs for a nominal fee and being massively ripped off whilst in them or being charged exhorbitant prices to leave the nightclubs,often resulting in violent attacks if refusing to pay,is there any truth in this or is it urban myth or down right scare mongering.

Thanks in anticipation.
GINGER