If you have free time, spend it actively, for example playing tennis!
2 tennis courts are waiting for your disposal.
Even if you do not play like Boris Becker or Anna Kournikova - remember that practice makes perfect!
Price of renting a:
tennis court PLN 15/ h
tennis racket PLN 5/ h
tennis balls (4 pcs) PLN 5/ h
Book yourself into active rest!