Underground Sports bar
Reviewing all sport bars I've been in Krakow here is a new one, English Football Club is not only for football games but for all kind of sports. You probably won't get any signal with your phone once inside as it is an underground pub.
No food is served inside but you will have for sure beer but with a large choice, cheap and good quality one. The pub is divided into several rooms with bricked walls and the atmosphere is really nice inside.
Expect it to be fully packed on major sports day and here you won't be able to book a table so unless you arrive way in advance you won't get a large wooden table forr your group but will be standing in the crowd for the duration of the game.
Staff is nice and will not even bother you if you come to the place with a burger bought next door.