Febiofest is one of the big Prague's International film festivals. We used to skip school just to see as many movies as possible. And then run from one cinema to another to catch all screenings. Well, it's getting easier now because you can see it all in one large multiplex cinema - Village Cinemas at Andel.
BTW, in Village Cinemas at Andel... they check your ticket only downstairs under the escalator and then you can go anywhere in the two above stairs and choose between the 12 movie screens. This means you can see as many films as your body allows you. Or until they get you :) But to tell the truth one movie at a time is just enough.