Travel / What to do in Katowice? (short journey) [9]

Hello all,

I just booked a flight with 2 friends to Katowice for the first weekend of November. We really don't know anything about that city and we booked that flight because.. oh well, it was super cheap :) The 3 of us are from France and in our early thirties and we would like to know what to do there. Ideally we would like to find a good mix in between doing touristy stuff (museum, sight seeing, etc) and partying (good coffee place, restaurant, pub, live music, places the locals go, etc).

We don't speak a word of polish even if I'll try to learn some basics sentences, and I'll be pretty much the only one with a good grasp of english. Will that be an issue? Is it considered impolite? What should I do to avoid any cultural faux-pas? All of us have done quite a few travels in our life and we always try to avoid being the douchey tourists and we'd love to mix and interact with people from the area.

Anyway please share your experiences and good tips, places we should avoid as well, really anything you think should relevant to our short journey.

Thanks!
Matt