Travel / Visit Krakow - places to go out at night? [6]

Hi,
I am a portuguese that will be in Krakow in the end of the next month for tourism. Can you give me some advice about where can I get some information in internet or some good places to go out in the night? There are any usual event at the weekend in Krakow?And about the traditional food there or some good restaurants to taste the polish food? There are differences between the food in Warsaw and Krakow? Because two weeks ago I was in Warsaw and I liked the food :)

Thanks a lot :)

Filipe