If you enjoy climbing, you should visit the bouldering facilities at Athletica Blindern or the climbing wall at Athletica Centrum. You don’t need to book in advance, and the price is NOK 35, - per hour.
In addition, you need to buy a single ticket at the reception, unless you are a member of
OSI Klatring. At the club reception, you can rent climbing shoes and buy chalk and chalk bags.