As a member of Stockholm University Union (SUS) you can book drop in courts for free at Stockholm Sports Center (Frescatihallen). All players must be SUS-members so don't forget to bring your pink membership card Campuskortet (app or plastic card).
As a member of Stockholm University Student Union you get a 20 percent discount on the Student Frescati Monthly Passes (ordinary price 299 SEK/month) if you sign up at Medley before the 15th of March 2017.
The discount is valid as long as the subscription is running and you can show the Campus Card. Time of cancellation is 2 months.
Check out the range of fitness classes at medley.se/frescatihallen
The Campus Book Store (Campusbutiken) has really great deals on course litterature and study equipment like pens, markers and notepads.