As a student of Charles University, you are eligible for a MultiSport Student card - a card that allows you to enter four sport facilities per month, free of charge. This includes the majority of gyms in the city, yoga classes or entrance to swimming pool. Additionally, you get four bikesharing rides monthly for free as well!

The card costs 299CZK per month and you can find more information and instructions how to get the card on the MultiSport website.